Sell BOY TOOLS - 6 PCS THREAD TAP DRILL BITS SET best price

Product Details: Shank:1/4 hex shank Shank diameter: 6.35mm Tap diameter: 1/8"(3.175mm);5/32"(3.97mm);3/16"(4.76mm);1/4"(6.35mm);5/16"(7.94mm);3/8"(9.53mm) Weight:Approx. 82g Suitable for drilling,tapping,cutting on soft metal,aluminum plate,iron,etc. Fast replacement composite cone,uses drill edged principle.High hardness,rustproof,solid and durable. Drilling and tapping in one,one-step processing,greatly save processing steps and time costs,improve working efficiency. Self-centering point,do not need assistant center drilling or center punching.