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RL21 RoundLock Bundle Including RL21A Socket

Product code: PD RL21BUNDLE

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This Sold Secure Motorcycle Gold lock bundle is the ideal choice for use with our Protector 19mm high security chains



1 - 50£49.95 ex VAT

51 + Call us on 01273 475500


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RL21 RoundLock Bundle Including RL21A Socket SKU Number - LKP42012

This bundle includes the High Security Pragmasis RL21 RoundLock which has achieved "SOLD SECURE MOTORCYCLE GOLD" accreditation plus the RL21A socket that will be needed to use the lock with our Protector 19mm Security Chain.


The standard RL21 lock is ideal for use with the 13mm or 16mm Protector Chains, but the standard socket section just fouls the 19mm chain link, which is why the specially designed RL21A socket with its bevelled top edge is needed when you want to use the lock with the 19mm chain.

The Pin Element of the RL21 RoundLock body is 21mm in diameter, so the lock doubles as a very compact, convenient disc lock, which at just 0.53kg is practical and easy to carry.

This RL21 Bundled pack allows you to use the lock with the 13mm, 16mm or 19mm High Security Protector Chains, but if you already have the standard lock, and you need to use it with the 19mm chain, you can as an alternative, just purchase the special RL21A socket to use with your existing lock.

Keyed Alike Option: We are able to offer the Roundlocks in a Keyed Alike option to save having multiple keys, however this option is only available when purchasing together and cannot be retrospectivly matched to key patterns from previous orders.


Resistance to attack

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!


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See all security chains

Unboxing a new purchase can be a chore, but to minimise our impact on the environment, Insight Security supply goods packed with the minimum amount of recyclable packaging needed to ensure your products arrive safely and ready for you to unpack.

Here’s what`s inside the product pack


Roundlock bundle with RL21a socket

Roundlock Padlock Bundle Pack Contents

1x Roundlock Padlock (this 2 part unit includes
     the Pin Section and Standard Socket Section,
     shown here assembled together)
1x RL21A Bevelled Face Socket
3x Keys

See also our Roundlock Video

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Shirley Dinnell

My husband and I had our BMW motorcycles stolen from our locked garage overnight so we were looking for some added security before we replaced them. Insight security were great to deal with and very knowledgeable about security products. After speaking to them we ordered Torc Maxi bolt down ground anchors, 19mm 1.5m chains and Roundlocks. They arrived less than 24 hrs after the order was placed and wow are they serious, solid bits of kit. The Roundlocks are small but it is easy to see how they are difficult to attack with no room between chain and lock for bolt croppers. They were pretty inexpensive too compared to the value of what we are trying to protect. I hope they are never put to the test but I feel that the bikes are a lot better protected now.

Andy Hair

Bought this to go with some 19mm chain, good quality lock that fits the chain link snugly and would be very difficult to remove by brute force alone, good lock, thank you.

Great complimentary lock

Bought this to go with 19mm chain. Fits well, does the job, very secure.

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