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Package Deal: Protector 16mm Chain, RoundLock

Sad News: We are Closing. Please see our News Page for more details.
RoundLocks Keyed Alike:
They have been out of stock but more have just arrived (24th September) and are being unpacked. We are catching up with back orders ASAP.
Shed Shackles: Final batch has completed manufacture and will be unpacked shortly.
Protector 13mm and 16mm Chains: Final batch in production for popular lengths only.
See our News Page for more details.

Package Deal: Protector 16mm Chain, RoundLock #1Package Deal: Protector 16mm Chain, RoundLock #2Package Deal: Protector 16mm Chain, RoundLock #3Package Deal: Protector 16mm Chain, RoundLock #4

Package Deal: Protector 16mm Chain, RoundLock

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

Protector 16mm uncroppable hardened boron steel chain (select length below), plus the super-compact RL21 RoundLock.

The chain is Sold Secure Motorcycle (Powered Cycle) 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 4.5kg/metre; the RoundLock padlock is another 0.6kg. 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(A) 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.

The RoundLock is generally not suitable for our 19mm chain unless the optional extra RL21A socket is also purchased and that is used in place of the standard RL21 socket. The RL21A socket is available separately - Please Click for the RL21A Socket product listing. However, please note that some batches of 19mm chain are a little wider such that the RL21A special socket is not required: In those situations, it is better to simply use the standard (non-chamfered) socket that is supplied with the RoundLock. The recommendation, always, is to use the closest-fitting lock arrangement that is possible.

The RoundLock can also sometimes 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.

Noose Chain situations: Click for Security Chain plus Multi-Lock Package Deals that can be more versatile than Noose chains previously offered.

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 Protector 16mm chain has the following link dimensions (nominal): 132 x 62-64mmmm outside; 100 x 30-32mm inside, throughout its length (an elongated end link is not required). It is constructed from 16mm diameter bar. The smallest rectangular hole it will fit through is about 65 x 34mm, but that would also be a tight fit. It is again fitted with a protective fabric sleeve, usually a bronze colour (adding about 4mm maximum to the width noted above).

Click for more technical info on the Protector range of security chains.

Click for more technical information on the RoundLock.

The following video gives an overview of the Protector 16mm chain (opens in a new window)

The next video gives a quick visual tour of the whole Protector range of chains, from the ultimate Protector Titan chains, through to the Protector 11mm (opens in a new window)

And this video shows how to fit the lock to the chain (opens in a new window)

And this video explains 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 (opens in a new window)


103 Product Reviews - Average rating 5 / 5 (Click here to expand and to show more reviews)
A great combination.
- 15/07/2023
I bought this to use with my Torc Mega anchor,the quality is exceptional, another great product from this company. Its fairly heavy but manageable. Would definitely recommend.
Fantastic Piece Of Chain Engineering
- 15/04/2023
I am very glad I bought this package deal, 16mm chain plus Roundlock. You can tell that the chain is exceptionally well made - I honestly can't see it being destroyed quickly. The roundlock is as beautiful as it is functional. Looks fantastic all in chromread more
Super quality
- 05/12/2022
This chain and padlock feel superb quality and the cover is a big advantage to protect paintwork. Ordering was very easy with immediate delivery, I would recommend this product to anyone.
Outstanding Quality
- 21/10/2022
Realy happy with both lock and chain. The quality of both is top draw and I feel confident that they will deter all but the most determined thief.

Customer service was excellent, can't recommend them highly enough. I will be back when I next need a lread more
Great chain and lock
- 18/06/2022
This is my second 16mm chain from pragmasis, not because of any issues with the first, just because I now have more bikes!

Great, fast service and both lock and chain seem top quality as with my previous one
Manufacturer Pragmasis
Price (inc VAT): £179.90
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