The easiest and fastest placing ice screws on the planet, the Black Diamond Express Ice Screw features a tapered tube where the teeth cut a hole just larger than the tube itself, for less friction during placements. A large, color-coded crank knob makes for easy size identification and uninterrupted 360-degree motion. Advanced tooth geometry for easier starting and faster placement Larger crank knobs with uninterrupted 360Adeg motion Stainless steel hangers with two clip points Color-coded for quick indexing CE certified, patented Product Details Weight : [13 cm] 138 g (4.9 oz) [16 cm] 146 g (5.2 oz) [19 cm] 159 g (5.6 oz) Strength : 10 kN (2248 lbf) Materials : [Screw] chromoly [Hanger] stainless steel