The thickest of these three chains resists bolt croppers and substantially slows down a disc cutter. It's the best chain we've ever taken tools to, and the thinner ones are pretty good too. We tested ...

A Protector chain, secured with a Squire padlock, is a serious security option – back in 2008 we described them as the toughest chains we'd ever tested. The links of this two-metre chain are 13mm ...