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Package Deal: Protector 19mm Chain, RoundLock RL21 & RL21A Combo

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Package Deal: Protector 19mm Chain, RoundLock RL21 & RL21A Combo

Discounts Apply !
  •    Info
  •    Tech
  •    Video
  •     Reviews

NEW: Protector 19mm ultimate uncroppable hardened boron steel chain (select length below), plus the super-compact RoundLock with both RL21 and RL21A sockets (compatible with 16mm and 19mm chains, respectively). The chain is Sold Secure Motorcycle Gold (in fact, it is Sold Secure Gold in every category) and the RoundLock is Sold Secure Motorcycle Gold/Quad & ATV Gold/Bicycle Gold/Motor Scooter Gold approved. The chain is 6.3kg/metre; the RoundLock combo is another 0.8kg. The chain is supplied with usually bronze colour sleeving, and the chain itself is finished with either zinc plating or a black finish.

3 keys supplied.

Keyed-alike available at initial order only (not available retrospectively) when ordering more than one lock together, and only amongst other RL21 locks and/or DIB-Series D-Locks. These locks can't be keyed-alike with any of the Squire locks. Please note that the Keyed Alike option must be selected for *all* locks in the set that you wish to be Keyed Alike.

This package includes the standard RoundLock RL21 socket and also the RL21A socket, allowing a beautifully close fit with 16mm and 19mm chains, respectively. The RL21A socket is custom-made to suit the Protector 19mm chain.

The RoundLock can also be used as a motorcycle disc lock - Check that you have a suitable opening that will take the 21mm diameter shackle in your brake disc or disc carrier. You can then use this with a chain when at home and as a disc lock when out and about. Note that disc locks do not prevent a bike from being lifted into the back of a van, which is a common technique employed by thieves.

Price and weight shown are for the package including a 2.0m long chain - Please select alternative lengths below and the price displayed will be adjusted automatically.

The following video gives a quick overview of the Protector 19mm chain:


Noose chains are not available for the Protector 19mm because they become so unwieldy.

The following video gives a quick visual overview of the whole Protector range of chains, from the ultimate Protector 22mm Titan chain, through to the Protector 11mm:


Below is a short video overview of the SFB RoundLock, showing how it can be used with our Protector 16mm and 13mm chains and, with the optional RL21A socket, with the 19mm chains:

86 Product Reviews - Average rating 5 / 5 (Click here to expand and to show more reviews)
What a chain
- 01/10/2022
Went back n forth on chain size and lenghts, bought two, this 19 mm and round lock and the 16 with dib lock. This is heavy, well protected quality chain and frankly glad I didn't go up to the 22 cos I don't think it would have fitted round the bike. Paireread more
Seriously Solid Chain
- 20/09/2022
I ordered this chain to lockup my motorbike at my rented home to the removable Double Doofer Pragmasis anchor. It is very well made, heavy and extremely solid. Even the welding looks the best I've seen. I would definitely recommend. I have even ordered a read more
Great value chain and lock.
- 22/08/2022
Excellent high security chain and lock. Works great with the double doofer ground anchor. Buy with confidence.
Absolutely solid
- 13/08/2022
Bought this 19mm chain and roundlock combo along with the torc maxi ground anchor,and I'm very happy with all three items.

Opted for the noose-ended chain, which gives a little more flexibility in how it is used, but this is generally the permanent, ovread more
Good Looking Chain
- 13/05/2022
Very happy with the purhase of Pragmasis 19mm chain and Roundlock.
All their products come top of the Bennetts attack testing and this product is no exception.
Have spent a lot of money on many of their security products but consider them to be worth evread more
Price (inc VAT): £211.95


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