FIELD TESTED: BLACK DIAMOND GRIDLOCK

Utterly simple in its design, foolproof in operation and flawlessly effective, Black Diamond’s Gridlock belay carabiner is one of those things that makes you wonder why it had taken so long for someone to come up with it. Introduced to the market about a year ago, the Gridlock has become a staple on my harness, and the one ‘biner I use with every belay device I own.