Mammoth Heavy Duty Disc Lock

Bought this after struggling to get expensive disc locks to fit. Easy to install although key can be a bit sticky. Not the most robust lock but will certainly act as a deterrent and easy to pop a chain through it.

Cheap and plain, works fine.

Use it in the office garage to make the toe rags take someone else's bike instead of mine.
Good value at this price.

It's OK. Does the job, easy to open and it can be used as it is or on the chain.