DMM's Mantis is your classic belay device made with lightweight high performance internal geometry. The handle is smooth for up to two single or half ropes. Friction grooves offer an additional bomber grip on ropes between 7.5mm-11mm.
Great for outdoor climbing as well as indoor training, the Mantis is a proper all-rounder.
DMM is an awesome recreational climbing and mountaineering equipment company from Llanberis North Wales. Founded in 1981 they still make and test all their gear from home.