10Pcs Spot Weld Cutter Set Incldue: 2 x Drill, 2 x Pilot Pin, 3 x 3/8Inch and 3 x 5/16Inch hole cutters-providing the versatility to handle a variety of drilling tasks in different materials. Material: Made from high-quality HSS, high hardness, and wear-resistant. The Center pin on the bit is spring-loaded. Easily Separation: The spot welding cutting machine drill bit can easily separate the spot welding plate without distorting the metal plate. Separate Spot-welded sheet metal, panel, etc, and cut small access holes. Double-Sided Weld Cutter: This weld cutter is a double-sided rotary cutter blade that separates spot-welded panels more effectively than a panel cutter. Double-sided 3/8 inch rotary blade and Hex Shank fit most drills. Application: This spot weld drill bit set is suitable for thin stainless steel sheets, iron sheets, aluminum sheets, F.R.P, or other thin metal sheets. Item Type:Spot Weld Cutter Set Sawtooth Part Diameter:3/8in Rod Diameter:8mm Colour:As Shown