For over 80 years, Holmenkol has been dedicated to the production of the finest ski waxes available. Today, they lead the way, with the introduction of nano technology, combining sport with ground breaking science to produce a comprehensive line of waxes and tools, proven in World Cup use, and suitable for all types of winter sports enthusiasts. The Holmenkol Gummi Stone is a rubber grit block for safe detuning of the tips and tails of skis and snowboards. It can also be used to remove rust and burrs from edges.Material: Rubber block with grit treatment Packaging: Comes in cardboard sleeve for protectionOur OpinionOne of the handy tools in the workshop, use a gummi stone to remove rust and burrs from edges before tuning. Tackles case hardened areas well. Then also use to detune the tips and tails of skis and of boards to prevent catching an edge when initiating or finishing turns.Is This For Me?A handy tool to have in the workshop or even the backpack on the slopes.