Description: 8pcs 1/2 Inch shank HSS twist drill bit, including 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1".
Specification: Type: 1 Bag.
Material: HSS 4241.
Hardness: HRC61.
Shank diameter: 1/2".
Flutes diameter: 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1".
Length: 150mm.
Quantity: 8pcs.
Features: For general using drilling in wood, aluminum, malleable iron, steel, plastic etc.
Material for high-speed steel 4241, higher wear resistance, toughness and bending resistance.
Increase the groove, chip more smoothly, drilling fast.
Sharp head, through a special grinding edge, to speed up the punching speed.
Full grinding process, the surface is more smooth, more smooth groove, processed products less burr.
Package Included: 8 x Drill Bits
Product Attributes: