PETZL - Spatha, Knife with Carabiner Hole for Climbers EASY TO USE: The smooth and serrated combo blade easily cuts through ropes and cordage. ALWAYS ON HAND: The SPATHA features a hole to attach to a harness with a CARITOOL tool holder or carabiner. EASY TO OPEN: The notch in the blade allows you to open it with bare hands while the textured wheel allows you to open it while wearing gloves. SAFE AND SECURE: The SPATHA features a locking mechanism that secures the blade in the open position, making it safer to use. DURABLE: The stainless steel construction improves the durability of this blade.