Porter Cable ETX1 Ex-Cell Mini Rotary Tool Porter Cable ETX1 Ex-Cell Mini Rotary Tool Ex-Cell Air ETX1 Ex-Cell ETX1 - Mini Rotary Tool *Avg. SCFM Req. @ 90 PSI: 4.0 *25000 RPM Includes 1/4 and 1/8 collets for all types of grinding stones and rotary tool bits. *Rear exhaust. *Ideal for general high speed grinding polishing and deburring. Product Reviews