This high powered grinding head, primarily designed to be used in the powerful hand held pneumatic button bit grinder, is configured for hand-held use by ergonomic placement of a very efficient throttle and support handle. Simplicity in design combined with the latest manufacturing techniques gives the operator a powerful tool for the most demanding job.leading the technological evolution of button bit grinding equipment is our aim. Air hand-held Button bit grinder machine (CME button bit grinder,pneumatic button bit grinder) Grinding machine for button bits, grinding pins, Hexagon grinding cup for drill bit, grinding carbide, button bit, DTH bit, tungsten carbide, air flush, water flush, button bit grinder is used for grinding carbide on button bits such as DTH-button bits, and top hammer percussive bits.