Lightweight, compact auto-braking descender for rope access and rescue For 10-11mm semi-static rope The unique anti-panic feature on the lever allows you to control dangerous drop speed due to overpull of the handle. Durable heat cast aluminum alloy body and lever Precision cast stainless steel machine Patented internal mechanism and locking cam design The locking cam absorbs shock energy caused by a slight slip of the rope, minimizing the friction and deterioration of the rope. It operates very smoothly against the rope, making it easy to climb the rope. Triggers inactivate the cam and allow the rope to slide quickly when not in heavy or limited load conditions. Includes steel ring for attaching keepers cord to prevent dropping. It can be used for climbing by using a dynamic rope of 9.9-11mm. Normal use as Descender, up to 244.6 lbs (120 kg), and up to 200 kg when rescued. Weight: 9.5 oz (280 g); Compatible rope diameter: 0.39 - 0.43 inches (9.9 - 11