DMM Belay Master 2 HMS Screwgate Karabiner

An excellent solution to prevent belay plate karabiners from turning round in use thus eliminating the risk of cross-loading the gate. Best suited to climbing walls and group instruction as when clipped out of the way on the back of your harness one can't fasten the plastic bit in place and it's liable to fall off (however, there is a solution to this*).

Rope bearing radius 10.9mm.

*Top tip: Using your Belay Master for trad climbing? Don't want to lose the plastic bit? Make a hole in the flat piece of the plastic bit and work a keyring through the hole and round the bar of the krab. If you've followed all that, you shouldn't lose the plastic bit.