Standard Abrasives Unitized Mounted Point 877041, 731 W163 x 1/8 inGeneral Information Brand Standard Abrasives Attachment Type Shaft Country Of Origin United States California Residents Proposition 65 Warning Dimensions and Specifications Head Diameter (Imperial) 0. 25 in Head Diameter (Metric) 6. 35 mm Maximum Speed 60000 rpm Overall Length (Imperial) 0. 5 in Overall Length (Metric) 12. 7 mm Shank Diameter (Imperial) 0. 12 in Shank Diameter (Metric) 3. 04 mm Grit Non Pertinent Micron Grade Non Pertinent Overall