TITANIUM COATED HIGH SPEED STEEL. ALLOWS PRECISION DRILLING OF 15 DIFFERENT SIZES HOLES. DOUBLE FLUTED DESIGN FOR OPTIMAL SPEED AND ACCURACY. IDEAL FOR THIN SHEET MATERIALS. 3 SIZES ALLOW HOLE RANGE FROM 4- 32MM COMES IN STORAGE POUCH INNER/CASE QUANTITY: 10/60 FULL PRODUCT DIMENSIONS 21x17x6