Petzl William carabiners are an HMS (German for Halbmastwurfsicherung) shaped carabiner. This design is great for those who prefer a wider gate opening and more room for rope hitches and accessories. William carabiners are made from high tech aluminum alloy. This carabiner uses the ball lock system, which gives you easy one handed operation with a visual locking indicator. Ball lock design is now made with an improved metal gate. William carabiners have a keylock, anti snagging gate opening also. Individually tested and CE approved. Length 4.5" (115mm) Width 3.0" (750mm) Gate Opening 1" (24mm) Weight.21lbs (94g) Minimum Breaking Load 5,625lbs (25kN) Work Load Limit (10:1 Ratio) 560lbs (2.5kN)