Unique Security Products and Specialty Locksmith Services

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June 1, 2018

Installation Of Upgraded Gate Locks From Standard To High Security Using D&D Technologies Lokk Latch Deluxe And Bilock Extreme Security Bump Proof And Virtually Pick Proof, Copy Proof Keys

 Recently we were called to upgrade a clients gate locks to double cylinder high-security and expand the already secure Bilock Extreme Security Key System. The system is a few years old, but it has been very effective in preventing her nosy neighbors and other vagabonds from getting in to her house.

But these would-be opportunists continued to play games and were accessing her perimeter gates by simply picking the simple wafer/disc tumbler key cylinder found on the cheaper version of D&D Technologies gate lock.

Following is a description of the process involved in dismantling the locks, installing the Bilock cylinders into them and then installing the new locks to the requested gates.

This is what we saw on first time arrival onsite. The original lock installed to the gate and post shows the existing wafer/disc tumbler keyhole.
Original D&D Gate Lock On Front Gate

The Lokk Latch Deluxe by D&D Technologies is an upgraded version of the standard range of D&D Gate locks, enabling high-security master key systems to be embedded within.

Lokk Latch Deluxe
The Lokk Latch Deluxe is built from high-grade polymer, that ensures a simple to operate mechanism that weathers the elements and continues good use. You can see the rear of the internal mechanism here...
A look at the rear of the primary unit
We must disassemble the mechanism to be able to replace the cylinder with a high-security cylinder.
Pulling the cylinder and locking assembly out is straightforward. pictured here you can see the cylinder pocket, the plunger spring, the bezel guide and the locking bar.

An exploded view of the removed internal mechanism of the Lokk Latch Deluxe

Inserting the new high-security cylinder is a simple and painless exercise.
This the rebuilt mechanism including the new Bilock cylinder
The Bilock Extreme Security cylinder shown here is used in deadbolts, entrance sets and many differing switch locks. Because you can use different screw on tail caps, Bilock offers many and varied brands of hardware where their high-security cylinders will fit into.
The screwdriver is shown here to offer a size comparisson

A Close Up View of the rear of the Bilock cylinder before the retaining screw is inserted.

The interior button is easily removed too. Simply slide the retaining plate (a half moon shaped cover) and remove the old cylinder. You will need to remove the old tail piece and install it to the new Bilock Extreme Security cylinder, like in the above images,
This is the interior press button with the old cylinder still in it.

Be sure you follow the included installation instructions in the Lokk Latch Deluxe bag. Correct installation will ensure continued painless operation of the product.
The newer model of the Lokk Latch Deluxe includes a flanged attachment that dramatically increases the security of the fitting. I am using it here as a guide to align the lock body correctly on the fence post.

Pilot drilling your holes is a good practise to get into to ensure accuracy and precise fitting. You can easily increase a hole size as desired, but you can not decrease a hole size easily. I use a 5/32" guage high-speed twist drill on a fast speed setting on my drill to drill the pilot holes. Then I expand the connecting tail piece hole to the required 1/2". A 1/2" hole may seem too large, but consider that this will help you with easy alignment of the lock mechanism when time comes to screw it all together.
D&D Technologies have made it easy, including 2 different length connecting tail pieces, ensuring you can use the product on a variety of size and width doors and gates, Simply cut the connecting rod to the required size of your application.

The completed installation looks and operates first class. this view is from the outside of the gate.
Completed Installation of the Lokk Latch Deluxe, keyed to a high-security Bilock Extreme Security master key system

This is an image of the interior portion installed and completed.
Completed Installation of the Lokk Latch Deluxe

This image is from another gate at the same premise. All told, we installed 3 of the Lokk Latch Deluxe, all keyed to the Bilock Extreme Security Key Control System.

Notice here the brackets attaching the fence, above and below the new lock, are not aligned with the holes? This was necessary because the old lock used a smaller footprint and we were required to move the brackets to enable the new lock to fit correctly and operate flawlessly.
 The stainless steel pin is very strong and weather resistant. It is also fitted using a flanged bracket that increases the security of the application.
This is the pin that secures the gate in the lock mechanism.

 Many people may be unaware that there are brilliant and totally effective mechanical locking products to suit a wide variety of specialty applications.

Experienced locksmiths across the world pride themselves in keeping abreast of modern trends as well as training newcomers to understand the lessons of the past.

This is why I will always suggest that customers choose to consult your local locksmith, to gain an insight into quality products and services that many locksmiths bring.

Certainly, do your own research online if you must. But often the local qualified professional locksmith can save you a lot of time, money and product knowledge.


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Danny was very professional and friendly at the same time. He not only gave me the quote and fixed the exterior door and explained his work. He was prompt and upfront about the work and did the work. He came in time took care of it on the same day. (Sasheethn K St Louis MO) June 2018d out problems but assured not urgent. Please feel free to have Danny pass out my number for my total experience review 314-351-5553

Charlie M. (St Louis, MO) November 2015

Danny was pleasure to meet and was very knowledgable. He explained several lock replacement options but I decided none of them were a good fit for a storm door, however, I did replace a lock on my entry door with a type of lock I had never seen before. I would highly recommend this company.
Patricia J (Bridgeton, MO) March 2014
They were prompt and showed up when he said he would show up. He knew his stuff. I had ordered new handles and he was honest enough to say that we don't need them that he can fix the doors and he did. Made me lock and unlock my doors to his satisfaction so that I knew what to do. Am very, very pleased with the service and cost.
Joyce K (Glencoe, MO) May 2015

Showed up on time for appointment. Was very knowledgeable about the project and offered a solution beyond what I asked to be done.
Stephen G (Chesterfield, MO) May 2015

Daniel was right on time, assessed the problems I had with two doors, made the repairs, and explained what caused the problems to begin with .... He is a "door expert" and a true professional. I highly recommend him.

Vince V (St. Louis MO) May, 2015

Danny was fabulous! He went over my concerns and he provided me with more than a fair quote. He was there when he said he was going to be there. I would highly recommend Danny. Cheers!
Denise S (Imperial, MO) May 8, 2014

Hired Danny to re-key locks on "new" house purchase. He advised to replace with new deadbolts & door knobs on 3 entry doors instead which I agreed with. All doors have 1 matching key & the safety of excellent quality product & workmanship. He also added new strike plate to door frame to complete project.. I recommend as your 1st & only call to a Locksmith.

Denise F (St. Louis, MO) April 3, 2014

Danny was very helpful in solving a pretty complex problem involving many lock.
Scott C (Eureka, MO) March 27, 2014

Needed patio door track to run smoothly. Arrived early, fixed door and explained what he was doing during repair. Quick and easy. Door works great, my wife will now speak to me, and I've become a better dancer.

Mike W. (Arnold/Oakville MO) July 2013

The owner spent a longtime with me on the phone helping diagnosis the problem. He was on-time, friendly and helped resolve my issue. I will definitely use him again!

Chris C (Lake St Louis, MO) July 2013

I had a very pleasant experience with Master Key Systems. They came out, did the job (which took longer than expected) and they did not change the price they quoted me. Now, I am not certain that it was a great value for the money because I don't have a comparison, but they did what they said, when they said, for the price they said. Enough said!!!

Antonio B (Saint Louis, Missouri) March 2013

Professional.. Upfront about charges. Fixed the sticky door within 20 minutes. I will recommend Master Key for exterior door issues.
Muthu R (Ballwin, MO) July 2012

Danny was a master craftsman, knowledgable and professional. I will be calling on him again in the future as well as passing on his services to friends and family.

Marsha L (Saint Louis, MO) July 2012

Danny was excellent! I called him on a Monday to fix a sliding glass door. He happened to have the exact part we needed (and it was not an easy find - we had looked everywhere) and he came over Tuesday evening. He stayed until 8:00 until the job was done, and cleaned up afterwards. He was courteous, professional, and efficient! I could not be happier!

Rachel P Maryland Heights, MO (July 2012)

He did an excellent job. Got there on time and quickly solved the issue. Was very pleasant and explained the situation and how to keep the door from sticking in the future. Would definitely use Master Key LLC again!

Neil F. (Saint Louis, MO) April 2012

Danny was very friendly and knowledgeable, although his apprentice seemed to do most of the work, Danny kept an eye on him to make sure it was done right. He had very reasonable pricing for re-keying.
Greg D (St Louis, MO) October 2011

He was extrememly fabulous and helpful and did a wonderful job. He was very professional.
Shannon M. (Arnold, MO) October 2011

Growing up spending so much of my time in Italy, the uniqueness of the Nova Classico left quite an impression on me. To be able to have and enjoy them in my own home here in the states is a nostalgic indulgence I'm enjoying beyond words. Thank you Danny for coordinating this transaction.

Joseph M (Chicago, IL) September 2011

great job. hired on the spot and he did job right then at great price

Ron B (Arnold, MO) July 2011

I searched the internet and found your services. I received three phone calls within several days. A service call was scheduled. Two gentlemen arrived promptly, analyzed the problem and fixed it.
James & Florenc M Saint Louis, MO July 2011

The repairman was on time and did an excellent job of fixing a very stubborn door lock. He was persistent and cleaned up the work area afterwards. I would use this service again.

Brenda F (Saint Peters, MO) June 2011

Danny at Master Key Systems has succeeded in making the purchasing of our Meroni door locks, from Italy, an absolute breeze. Even though I live in Australia with a 16hr time difference and was ordering door knobs from Italy that weren't in stock, the whole process was faultless. Danny was prompt and efficient with all his emails and made sure we had covered every possible variable so that the product I received was exactly as required. I would have no hesitation in recommending Danny for your next purchase.
Patrick Carr (Canberra, Australia)

Your product really helped because I needed to secure a nurse's station adjacent to a waiting room and needed a pocket door. Unfortunately, no real options were available to lock a pocket door effectively that would keep me compliant with HIPAA and secure an area that stores medical supplies. This was vitally important as this particular waiting room was for "waiting detox patients". Thank you very much.
Randall R The Fritz Clinic (Birmingham, Al) March 2011

Danny was very polite and knew what the problem was and how to fix it. He also gave me some information about other issues that could arise with my door and locks. Will hire again if I ever need that type of work done.
Jason M Imperial, MO March 2011

I had an exterior basement door that dragged when opening and closing. The hinges were not fitting properly and the door frame had shifted, probably due to the age of the house.The screwswould not go far enough into the wall without hitting stone...even using a special drill bit. Dan worked a long time drilling and sanding to shore up the door as best as possible. I know it will never be perfect. He could have easily sold me a new door and the same issue would happen. He was honest, thorough, and did an excellent job without charging me a fortune. I'm satisfied with the door now. If you want an honest, experienced man, Then Dan is the man

Roger M Saint Louis, MO March 2011

I purchased the Cowdroy P697 Pocket door lock with key over the internet. I emailed questions before my purchase and was provided with the answers quickly by return email. The purchase was quick and easy and the lock was shipped immediatly. Installation is quick and easy. But you do need to convert millimeters to inches (use the internet) in the installation instructions. And the lock looks great and works great. I will do business with them again. THANK YOU

Ed D (February, 2011)

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This site is to inform about historical and modern approaches to Keys and Physical Security products and services.
Locks210.com, a division of Master Key Systems America LLC, established in 2006, offers residents and businesses of St Louis Locksmith premium quality products and services. As the Premier Bilock Extreme Security Dealer in The Mid-West,
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