Camp PIU 2.0 Belay With Kit Core Lock CarabinerCamp PIU 2. 0 Belay With Kit Core Lock Carabiner The Piu 2. 0 uses a variable notched design with smooth teeth on the brake side of the device to lock onto ropes with more friction than other tube style devices. Other features include the ability to set up the device in auto block mode for belaying two seconds and a large rigging hole that allows a locking carabiner to rotate all the way through. The Core Lock is an extremely smooth HMS belay and