A: Miniature Mounted Flap Wheels, with1/8?shaft Diam*width*shank Grit Maxrpm 3/4?3/16?1/8? 60# 80# 120# 180# 38.200 3/4?3/8?1/8? 38.200 3/4?5/8?1/8? 38.200 3/4?3/4?1/8? 38.200 1-3/16?3/16?1/8? 31.800 1-3/16?3/8?1/8? 31.800 Characteristics: Premium Aluminux Oxide and non-woven material Ideal for stock removal,deburring,cleaning,blending and finishing. provide fast polishing and light deburring of internal work with holes or grooves as small as 1/2? Cleaning of weld surfaces,removing machine marks & flaws.