[Safty Guarantee]: CE 1019-435 EN 567:2013 ensures its security.Hand ascender you can trustWeight limited:140kg/ 308Ib,Breaking strength8.5KN.Tension:4KN,for 8~12MM Rope. [Smoothly Move]: The ergonomic construction gives you a large and comfortable handle to hold on and can be installed with one hand.Ascender moves and stops smoothly as the large sharp teeth bite the rope tightly?The ascender is easy to stowed when you've got your expected height or prepare to descend. [Ergonomic rubber handle]: Comfortable ergonomicrubber handle adds the friction and protects climber's hand,wide opening allows the handle to be easily grasped, even with thick gloves. [Solid Stainless Steel Cam]: Made of stainless steel, rustproof and anticorrosion, can handle most situation and service for long. [elaborately designed]: For connecting carabiners and webbings. 2 hole attachments in both upper and lower side of ascender to let operator put to great use.hand ascender is elaborately designed for ascending a rope, perfect for rock climbing, tree climbing, arborist and any other ascension activities.