PETZL - Mini MARTEAU, Lightweight Hammer for Ice Axes COMPATIBILITY: The MINI MARTEAU hammer is compatible with Petzl's QUARK, NOMIC, and ERGO ice axes. PURPOSE: The MINI MARTEAU hammer is attached to your ice axe and used to place pitons. DESIGN: The minimalist design doesn't add a significant amount of weight to the axe so it doesn't lose its balance. LIGHTWEIGHT: The MINI MARTEAU weighs only 20 grams. DURABLE: The MINI MARTEAU hammer is made from strong and durable steel.