Item Description:Features:Suitable for drilling, tapping, cutting on soft metal, aluminum plate, iron, etc.Fast replacement composite cone, uses drill edged principle.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.High hardness, rustproof, solid and durable.Specifications:Material: HSSShank diameter: 6.35mm hex shank(1/4")Thread direction: rightFull length Blade length Blade Diameter Screw pitch Weight001 53mm 23mm 3mm 0.5mm about 8g002 53mm 23mm 3.3mm 0.7mm about 9g003 56mm 27mm 4mm 0.8mm about 10g004 56mm 26mm 5mm 1.0mm about 10g005 57mm 27mm 7mm 1.25mm about 13g006 57mm 28mm 8.5mm 1.5mm about 15gPackage Included:1pcs Hex Shank HSS Drill Bit & Screw Tap of Metric2, After the promised time limit is delivered, please contact us, we will make up for a certain amount of coupons3, If it is not sent after the promised time limit, we will refund or resend unconditionallyRefund1, Unconditional refund is not reached within the time limit3, not applicable, do not want to be partially refundedItem Specification:DIY Supplies: WoodworkingType: OtherUse: PCB DrillingMaterial: High Speed Steel