Small, But Mighty: The RL21 “RoundLock” Picked
Introducing the SFB RoundLock
This video provides a quick guide to the brilliant Sold Secure Motorcycle Gold rated SFB RoundLock.
We have long been fans of the Dumbbell style of padlock, which when used appropriately with a security chain, prove highly effective and very difficult to attack.
The RL21 padlock is ideally suited to use with our serious security Protector Chains (13mm, 16mm or 19mm chains).
The Pin Element of the lock body is 21mm in diameter, which means that the lock even doubles as a very compact and convenient disc lock, and as it weighs just 0.53kg it`s easy and practical to carry.
The RL21 is designed for use with Protector Chains up to 19mm, although the standard lock can only be used with chains up to 16mm and you will need the additional special RL21A socket if you want to use the lock with the 19mm chain.
The lock comes with three keys as standard, and locks can be keyed alike to other RoundLocks for a small extra charge (please call us; 01273 475500 to discuss your needs).
When tested in use with a 19mm Protector Security Chain by Bennetts - the Bike Insurance Specialists in Oct 2017, this was the result;
...the RoundLock is an excellent piece of kit, fitting snugly against the edges of the chain`s links, making it very difficult to attack.
When attacked with a sledgehammer, the lock merely deformed (the shape of the lock itself makes it very difficult to hit squarely).
It`s inaccessible with bolt croppers, and is so thick that an angle grinder attack causes little damage – in fact the chain is the easier option for a crook to attack ...and that is also a very tough cookie to crack!
…if you need any further help or advice, you’ll find plenty more information on the Insight Security website; or just call our friendly specialists on +44 (0)1273 475500, we’ll be pleased to help.
The RoundLock from SecurityForBikes.com
This is a brief video overview of our SFB RoundLock lock, and how it can be used with various of our Protector security chains.
It covers the standard RL21 RoundLock with our Protector 16mm and 13mm chains, and also the optional RL21A socket that allows it to be used with our Protector 19mm chain.
We mention that the RoundLock can be supplied Keyed-Alike with other RoundLocks, and also with our new DIB-Series D-Locks, but please note this only applies at time of order and not retrospectively.
There is much more information about our locks on our web site:
pragmasis 22mm Titan chain
review on 22mm Titan chain from pragmasis
(L3) Secure a motorcycle the right way. Pragmasis Protector 19mm chain & Torc Anchor
Demo on securing a motorcycle with UK made Pragmasis Protector 19mm chain, Torc Anchor, 23mm Anti Pinch pin and Squire SS65SS padlock. Most motorcycles are stolen simply because they are not locked up or secured with low level locks. It is not because that china made brand has a superman name that their locks will necessarily protect your motorcycle.
Have a question, leave it in the comments below or check out Pragmasis products at
Motorcycle Security Improvements | Pragmasis | Biketrac | DoubleDoofer
Motorcycle security is something you have to keep evaluating and improving over time. With that in mind I've made a few revisions to my own.
Pragmasis locks, chains and ground anchors found here:
Biketrac motorcycle security tracker found here:
Datatool motorcycle security found here if you want an alternative:
List of top security locks and chains and how they test found here:
Original security tips video found here:
H&S UK smiley dimple lock for #stocklocksunday
If you’d like to contact me directly you are welcome to send me an email at
Thank you for the continued support, kind words of encouragement and taking the time to keep coming back to watch my videos
Shouts out to:
Lindal Security Ltd (Bletchley)
Locksport Anonymous UKLP
Lock Picking & Lock Sport (UKLP)
Without everyone’s support I wouldn’t be picking half the locks that I have so far
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New Site: 3Dlocksport.com - Custom Designed 3D Items for the Locksport community!
Sorry about the length, I just wanted to cover every product in depth!
I recently launched my new project called
I've created 3D printed items for the locksport community. This video goes over all the products and their features. I hope you'll check the site and share it with other!
 Brinks Locks With INEXCUSABLE Design Flaws
 Master Locks With INEXCUSABLE Design Flaws
 Abus Locks With INEXCUSABLE Design Flaws
Pragmasis 16 mm bolt cutter test
Pragmasis 16 mm bolt cutter test.
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Tri County Locksmith Service
1338 Grand Ave
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The referenced videos:
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This video was shot at the Red Team Alliance east coast training facility, where both government and civilian specialists learn a wide range of skills, from covert entry, to surveillance, to alarm bypassing. If these are skills you are interested in developing, check out for their training schedule.
Find many common entry tools at here’s a direct link to the tool used in this video: