Power-rated for speeds up to 2000 rpm, it fits any 3/8-inch drill or air tool. Perfect for mag or spoked wheels or in and around engine. The tool s patented no-scratch 8-inch shaft extends your reach, protects your fingers and safely fits into tight areas. The 100% viscose felt material won t tear like foam buffers. And the selfcooling means it can t scorch or burn. Can be washed and reused.