Diamond Countersink 3/8" X 100° Included angle, 1/4" shank X 2-1/4" overall length; 40/50 grit diamond

Diamond Countersink 3/8" X 100° Included angle, 1/4" shank X 2-1/4" overall length with #19 (.166") integrated pilot; 40/50 grit diamond. Ideal for use on carbon fiber, fiberglass, fiber reinforced plastics and other abrasive type materials