Best Padlocks

Quick Review on Best padlocks.

My name is Adrian Weber and I am a private Security Adviser with a CFPA certificate in Security and Security Management. If you have any questions please feel free to contact me.


commandolockcompany says:

How do you think that lock would perform on a pull test from the keyway? I really do like these complicated cores…we’re going to have some fun on our upgrades I’m guessing. I’m gonna keep you busy! Great video as always.

VicariousReality7 says:

LOL, i thought you were going to show me the best padlock brands

Adrian Weber says:

Good quality I agree!

douro20 says:

You can get ASSA and BiLock cores to fit these locks.  The BiLock core is a conversion system which uses its own interchangeable core, and is secured with a screw into the lock body.

Adrian Weber says:

thanks mate 🙂


very good review sir

Adrian Weber says:

Cool, interesting to hear that Eric and also interesting that you can not get them here at all. This is how things can be completely different on the other side of the planet!

Richard's World Traveler says:

The biggest reason for the interchangeable core is so the person in charge of a companie’s keying system can change the key very quickly. These cores are also used in door handles, deadbolts, and other commercial type locks. The person in charge can key the system so he has a master-key to everything, and he can make sub-master-keys. So he can give building maintenance people a key to all the places they need to go in to. If an employee leaves the job or gets fired, the person in charge of keys can change all of the needed keys very quickly. Some U.S. government agencies uses the Best lock system. That includes a software program to keep track of what key goes where, and it makes it simple for the key master to make a master-key system and subsystem.

Noctis Motus says:

Great and detailed video. Thank you.

techtrain65 says:

BEST cores typically have four pins per chamber (bottom pin, master pin, build-up pin & driver pin) but depending on how many different keys they are set to they can have as few as three and as many as seven in a few chambers. They are also available with hardened stainless steel pins for drill resistance and with spool pins for additional pick resistance.

Adrian Weber says:

Already did try, was a pain to get it back together even I only removed a few pins 😛

Adrian Weber says:

You can put the core back together without those tools but it is a pain 🙂
I had removed one or two of the pins and then stopped. Interesting things about those two shear lines!


Hey which ASSA interchangeable core will fit the Stanley 24/7 60 mm padlock?? (the big one)  thanks !!

Adrian Weber says:

Hey TRL, to be honest with you I never noticed that this is not the original Best Core! Now that you say it I have just recognised that. Thanks for the great info mate! I have to check your videos tomorrow looks interesting to me. I will take your generous offer and would love to have an original core for my Best padlock. Just send me a message here on YT and I will provide you with my Mail address and we can sort everything out, how does that sound to you? Thanks again, Adrian

Riyame says:

Now you know why I like them so much 😛 And yes, do not take the core apart because you need special tools to put it back together again. And picking them can be tough since there are 2 separate shear lines but you cannot mix them up or the lock will not open.

Adrian Weber says:

Thanks for the comment! Yes I also like them very much but back in the days when I did this video I actually knew NOTHING about them because we do not have them here. Friends helped me with information ever since especially Thomas Hermans who also commented here. He also sent me some Best locks with 3 pages of writing containing information! I will do a video about that letter but in a month or so as I have to do other projects first. I would advise you to watch his videos, they are really good

Christopher Lawler says:

What is an SFIC?

An SFIC is an acronym that stands for Small Format Interchangeable Core.

Frank BEST pioneered or invented the SFIC in 1925.

Frank BEST established his first lock company “Universal BEST Lock Company” in Seattle Washington, then later relocated it to Indianapolis, IN. BEST remained under family ownership and operation until it was sold to STANLEY WORKS in the 2000’s.

Frank BEST’s grandson, Marshall BEST founded MARSHALL BEST SECURITY CORPORATION as a result of the corporate liquidation or sale of BEST ACCESS SYSTEMS to STANLEY WORKS.

Until BEST was sold off to its current ownership, it generally sold its products exclusively to large, corporate, institutional or government end-users

[such as large university campuses, hospital/medical centers, large retail store chains, large office complexes, public housing authorities, state/county/local & federal government entities & military installations]

and only years after STANLEY WORKS had acquired BEST, would it make its product lines available through normal or typical commercial channels of distribution.

Best SFIC’s usually come originally in 5 pin, later 6 or 7 pin configurations emerged to satisfy the demands of modern, large institutional master key systems, and operate like normal conventional pin tumbler cylinders, with the exception of the two distinctive shearlines (operating & control, the only purpose of the control shearline is to install or extract the core for servicing or replacement); alongside the complex pinning specifications, that often require at least three pin “segments” per stack, and commonly four pin “segments” per pin stack when the operating shearline is master-keyed.

Although it is possible to master key the control shearline, as maybe practiced in a very large institutional environment, masterkeying the control shearline is rarely practiced.

There are three SFIC pinning specifications; A2, A3 & A4.

SFIC cylinders are serviced and repinned or combinated by driving out or extracting the pin stacks from the bottom of the core to the top using an extractor pin and a plastic or raw-hide mallet.

The design of the SFIC makes it impractical to remove the plug from the core assembly, as would be typically performed when servicing any other conventional pin tumbler cylinders.

Specific or special tools are typically utilized when servicing or combinating any SFIC.

Today, since the patents on the original SFIC design has long since expired; just about every other manufacturer is offering some sort of a “clone” of the original BEST SFIC. Some manufacturers are offering SFIC cylinders with their own restrictive proprietary Keyways or key cross-sections as a direct-retrofit or upgrade from the long-standing open/unrestricted legacy SFIC Keyways originated by BEST.

Some examples of aftermarket drop in retrofits for SFIC with restrictive proprietary Keyways are:

+ Schlage Everest
+ Medeco Keymark
+ Arrow FlexCore

Gervais Fillion says:

i dont have the 3 rd key and i want too change the core?
how do i it?

service1956 says:

These are good quality locks. Never really knew why the keys are stamped “Do Not Duplicate”. The locks have a very high tolerance rating that makes duplicate keys almost impossible. I have seen keys that had a very faint cut mark for one or more pin stacks. A lot of government, schools, and hospitals use these locks.

Speedy Juarez says:

I found an old Best pad lock at work and want to restore it. where can I find a tutorial on how to restore old locks? thanks

Adrian Weber says:

Thank you sir!

Thomas Hermans says:

Very Good Locks, too bad you don’t have a Best Core for your Best Padlock. The main reason for the removable core is the ease of rekeying or changing the access level. the cores come in many different key ways. I would be happy to send you a different tail piece to kake it key retaining and a Best core for your Best Lock

Adrian Weber says:

There are just different versions out there. Google their main catalog you should be able to find it! My favourite is the 41B which a friend recently sent to me! Google Best 41B and you will find their B Series brochure. It comes either with the stainless steel shackle or bronze shackle (to prevent sparks) I prefer stainless and short shackle clearance, dont like the long ones.

Eric Day says:

Nicely done my friend! I love Best locks. I have not been able to pick one yet. In the usa , at least here in Pennsylvania they seem to be used a lot in industries and state parks. Well built tough to get into locks indeed. I also see the lock cores in store front doors quite a bit .


I like my best locks, they are awesome locks……..

Billy Bob says:

I know this is an old video but I just watched it. You have a Best padlock but not a Best core. It would have Best stamped on the front of the core if it was authentic Best brand. Whoever sold/gave you this lock switched cores, highly devaluing that lock. But it’s still a nice lock.

Adrian Weber says:

nope 😛
That is why I decided not to remove them any further ant stoped after like the first two of them

Adrian Weber says:

I like their quality!

Adrian Weber says:

That is probably a weakness on them and I have also thought about it. Then again they do not have a certification and in my opinion their purpose is more the variety they offer and the easy handling etc.

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