Description: Four Slot Four Blade Auger Drill Bit 4 Flutes Hex Shank Bore Hole Woodworking Auger Drill Bit 10mm to 25mm   Specification: Material: Steel Diameter of Head: 10mm、12mm、14mm、16mm、18mm、20mm、22mm、25mm Diameter of Shank: 7mm Blade Length: 7mm Total Length: 165mm\/6.49'' Flute: 4 Flutes Quantity: 1pc   Features: Positioning the drill bit、 drilling more accurate. Application Material: Wood、plastic、Aluminum plate etc. Suitable for DIY、 Home and General Building\/Engineering Using. Threaded design、 high hardness、 cutting fast、 smooth wall after drilling.   Special Note: This new drill for tapping speed should not be too fast、 please refer to the following tables、 speed too fast causing screw heads sticking、 drilling into the declined return!   Please be noted this product is sold separately、 you can choose the size you need.    Package Included: 1pc x Auger Drill Bit   More Details: