Free Speed: 25000 rpm, Air Pressure: 90psi, Inlet Size: 1/4" Air Consumption: 4.25 cfm Collet Size: includes 1/8" & 1/4" collets Designed for High Speed Grinding & Polishing In Hard to Reach Area, Professional design, Has interchangeable collets allowing you to use 1/4" and 1/8" shank tools. Ergonomic handle for ease of use and to alleviate hand fatigue. Designed for High Speed Grinding & Polishing In Hard to Reach Area, Professional design, Has interchangeable collets allowing you to use 1/4" and 1/8" shank tools. *Ergonomic handle for ease of use and to alleviate hand fatigue. *All metal construction for long life