Description 6pcs 1 8 3 8 Inch BSW Thread HSS Combination Drill Tap Bit Set 1 4 Inch Hex Shank Deburr Countersink BitsComplete Hole Drilling Tapping And Deburring Countersinking In One Operation With Power DrillSaves Labor Time Applicable to some types of carbon steel and ordinary steel copper and aluminum alloy drilling hole Specifications Type Tap Drill BitMaterial High Speed SteelShank 1 4 6 35mm hex shankDIY Supplies MetalworkingWeight 80G Size 1 8 3 175mm 5 32 3 97mm 3 16 4 76mm 1 4 6 35mm 5 16 7 94mm 3 8 9 53mm SizeBit Diameter mm Shank Diameter mm Shank Length mm Blade Length mm Total Length mm 1 8 3 175mm 3 1756 353927665 32 3 97mm 3 976 353928673 16 4 76mm 4 766 353632681 4 6 35mm 6 356 353435695 16 7 94mm 7 946 353238703 8 9 53mm 9 536 35403979Features Suitable for soft metal tapping such as aluminum plate 3 4mm thickness The advantage is opening tapping chamfering Quantity 6pcs Tap Drill Bits Package Included 1x Set 6pcs Hex Shank Tap Drill Bits More Details