WOWSUPM 1/4” 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 - QDRK10B

• Package: 6 pcs 1/4” 6.35 mm shank Silver Twist Drill Bit (110 mm 4.34" longer) are for Wood Aluminum Copper Plastic, 2 pcs x 1/4” 6.35 mm shank Grey carbide tipped drill bits (110 mm 4.34" longer) and 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 case. Quick Replacement: The pilot drill bit set 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. The silver HSS drill bit is for wood, plastic, Alloy Steel, Aluminum, copper. The grey carbide tipped drill bit is for wood, plastic, Alloy Steel, Aluminum, copper, Air Brick, Stucco.