Locks that work

£24 with delivery. It seems too cheap! Isn't there some sort of quality issues with it? For OnGuard, I've heard of keys made of soft metal that breaks and really bad weather-proofing. Although I don't know if either of those applies to that specific lock.

The Abus is meant to be 13mm square, so should be thicker, heavier and more secure than the Strongman which is 13mm round.

Onguard have changed the lock and key design in their new 8000 series range. It is now a pinned lock with the coding cuts on the inside edges of a 'z' profile key, so the key ought to be stronger than the old design, and there are no discs to get misaligned and it shouldn't be possible to turn the key if it is not fully inserted.

The previous model 5000 series Onguard locks used a disc key, as do Kryptonite and Abus. As the disc lock keys are double sided, deep coding cuts make the key thinner, creating a weak point where it could snap if the mechanism gets stiff and rusty, or the key hasn't fully inserted and sticks when turned.

I've read a few reviews where the key has snapped in Kryptonite locks too: My Kryptonite NY 3000 started getting stiff, presumably from rust, after just one week of ownership, although a drop of mineral oil and plenty of WD40 squirted where the hasp goes seems to have cured it.

Abus keys are apparently thicker, so less likely to break, and maybe they use more rust resistant materials in their lock - I would certainly consider Abus a superior brand to kryptonite or Onguard.