10Pcs Spot Weld Cutter Set includes: 2 x Drill, 2 x Pilot Pin, 3 x 3/8 inch and 3 x 5/16 inch 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. Easy Separation: The spot welding cutting machine drill bit can easily separate the spot welding plate without distorting the metal plate. Separates spot-welded sheet metal, panels, etc., and cuts 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, and other thin metal sheets. Item Type: Spot Weld Cutter Set Sawtooth Part Diameter: 3/8 inch Rod Diameter: 8mm Color: As shown Material: Metal Package Contents: 1 set x Spot weld cutter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowed error is +/- 1-3cm.