Hiplok Z LOK locks £14.99 (pair)

The Z LOK is a reusable ziptie with a reinforced steel core that can be used to bolster security on your bike rack or be carried as a ‘just in case’ security measure. It’s not meant to be a replacement for a proper D-lock or chain (always be sure to buy the best security you can afford), but it adds a bit of peace of mind if you need to leave your bike on the back of the car for a few minutes or pop into the bar to grab a post-ride pint. Using it is a doddle, though the prongs on the tiny ‘key’ can get bent and need realigning for it to work. Thanks to its miniscule 21g weight, it won’t weigh your pack down. www.hiplok.com