ABUS Granit-X Plus lock, £64.99, www.abus.com

An oldie but a goodie, the Abus offers as much security as you’d expect in a Sold Secure Gold-rated lock. Clever design features like a parabolic, square-section 13mm shackle and double-locking mechanism add up to 
a very secure product. Abus 
has gone the extra mile in support and extras too, from ‘keyed alike’ which gives you 
one key for several locks and a 'code card' which allows you to obtain spare keys without fuss if you 
lose them. We’ve owned an Abus for a couple of years and not had 
the type 
of 'seizing' problems that we’ve sometimes experienced with one or two lesser products.