Whether youre rigging a Z-pulley hauling system or ascending a fixed line, the C.A.M.P. USA Compact Oval Screwgate Locking carabiner is the right choice. Locking oval carabiners are ideal for work with pulleys and ascenders while youre caving, big-wall climbing and aid climbing. Key lock nose wont snag on pro, ropes or slings, making the biner simple to clip. C.A.M.P. USA Compact Oval Screwgate Locking carabiner has a great strength-to-weight ratio.