Die Grinders MODEL NO : HTS – 552 Free Speed (RPM) : 25,000. Collet Size Inch (mm) : ¼” ( 6MM ) Air Inlet (NPT) : ¼” Hose Size ID Inch (mm) : 3/8” ( 10MM ) Air Consumption CFM (L/Min) : 4 ( 113 ) Length Inch (mm) : 4.8 (121) Weight Lbs (Kg) : 0.6 (0.3) Contact Us Enquire Now