Black Diamond Express Ice Screw 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 Available in five lengths, color-coded for quick indexing CE certified, patented Tech Specs Materials: [Screw] chromoly, [Hanger] stainless steel Display Weight: 13 cm: 138 g (4.9 oz), 16 cm: 146 g (5.2 oz) Strength: 10 kN (2248 lbf)