WOWSUPM 1/4 Inch Pilot Drill Bit Set for Hole Saw Arbor High Speed Steel and Carbide Tipped Drill Bit Cutting Multiple Material Hard Metal Wood Plastic Stuck Brick with 10pcs Set - QDRK10C

• Package: 6 pcs x 1/4” 6.35 mm shank Silver Twist Drill Bit (89 mm 3.5" longer) are for Wood Aluminum Copper Plastic, 2 pcs x 1/4” 6.35 mm shank Black Twist Drill Bit (89 mm 3.5" longer) are for hard metal, 2 pcs x 1/4” 6.35 mm shank Grey carbide tipped drill bits (89 mm 3.5" longer) are multiple cutting . it’s for brick, stuck, wood and soft metal, 1 mini case. Quick Replacement: The pilot drill bit is quick replacement for hole saw mandrel. Flat shank: it’s the flat side for set screw easily. Application: Wowsupm pilot drill bit is design for arbor of hole saw . It is for wood, plastic, Alloy Steel, Aluminum, copper, hard metal, stuck, brick.