6 Inch Hole Saw With Arbor For Metal Wood And Plastic Cutting, 152Mm Bi-Metal Long Service Life: Bi-Metal construction , special flexible steel saw body and high speed steel cutting teeth , makes longer service life , rust proof , great corrosion and heat resistance Superior Versatile Performance: High speed steel sharp cutting teeth effectively drills through metal , wood , cornhole boards, PVC board , plastic and drywall , clean and smooth , high precision Easy to Use: Rotate the arbor and hole saw until it's very close (don't need tight), then line up the locking pins with the hole at the hole saw and screw them tightly High Efficiency: The deep gullets on the sides of hole saw provides fast chip removal, and the geometry funtional slot on the bottom of hole saw provides easy plug removal Package Include: 1 pc 6'' hole saw, 1 pc arbor(with 1 drill bit), 1 pc drill bit for replacement, 1 pc hex key