Particularly suitable for sporting activities at sea and mountain : mountaineering, paragliding, trekking, canyoning, potholing, sailing, nautical activities. Sandvik 12C27 modified, 8,5cm stainless steel blade, 2,5 mm thickness for a higher resistance, with a serrated area of 3,5cm to cut lasting and effortless natural and synthetic ropes, shackle key (4-10 mm). Virobloc system to lock the blade in opened or closed position. The emblematic and ergonomic Opinel handle, 2 high end plastics, resistant to extreme temperatures from -40°C to +80°C and to water, grip area, pealess whistle (works by any time) built into the handle (110 decibels, heard from more than 300m). Synthetic grip for hanging on a hook / bag / belt.