It is a "2 in 1" product: a great carabiner, but at the same time it has been specially designed to be also used as a screw/gear carrier on the harness. It has two lumps on the body: one to better fix in on the harness, and the orther one to place the screws wile picking them. It comes with a rubber strip to help fix it on any harness. Individually tested, with the date of testing and progressive number laser-marked on it. Activities: ice climbing, mountaineering Materials/construction/technologies: aluminum Certifications: CE EN12275-class B, UIAA 121 Weight: 63g (2,2 oz) Length-Width-Opening: 120-75-27 mm Resistance:closed gate strength: 25minor axis strength: 9open gate strength: 10