Magnetic Pad Holds Tools For Working Repair Tool Magnetic Pad Holder Car Features - These countersink drill bits works great in making a smooth hole. - High-speed steel material , high quality with good durability for you to use. - Suitable for bore metal, PVC, wood, plank, aluminium alloy or plastic board. - An essential hardware tool for DIY or the professional wood worker. - It includes 4 sizes in one drill bit set ( 6, 8, 10, and 12), which meet your different needs perfectly. - Very convenient to change the bits with the included mini hex wrench which loosens and tightens the bits to hold and release as needed. Specifications: - Drill Bit Material: HSS-4241 (High-speed steel) - Black Chamfer Drill Body Material : 45 Steel - Hex Shank Diameter : 1 or 4" (6.35mm) - Size : 6 (2.38mm) , 8 (2.78mm) , 10 (3.175mm) , 12 (3.56mm) Package includes : 1 x Countersink Drill Bit 6 1 x Countersink Drill Bit 8 1 x Countersink Drill Bit 10 1 x Countersink Drill Bit 12 1 x Mini Hex Wrench