For rugged use and exceptional strength, the CMI Ultrascenders are the obvious choice. These are the strongest ascenders on the market. The large model features a molded handgrip for extra comfort, while both share simple one-handed operation on and off the rope. Combining extruded and machined bodies with stainless steel parts produces a bomber ascender for any usage. Sold in pairs. Large Weight: 270 grams|Large Length: 18.7 x 7.6 cm|Large Breaking Strength: 5,000+ lbs|Small Weight: 180 grams|Small Length: 13 x 7.6 cm|Small Breaking Strength: 4,000+ lbs