Includes:5-pack spot weld cutter 3/8 inch heavy duty cutting blades and extra center pin for a long-term usage.,Widely Usage:Suitable for thin stainless steel sheets, iron sheets, aluminum sheets,iron, cast iron, alloy steel, carbon steel or other thin metal sheets.,3/8 Inch:Fits for 3/8''handheld drill chucks or larger size and the spring loaded needle helps guide the cutting blades.,Convenience:Easy to handle with and replace,fast and quickly separates spot-welded panels without distortion.,High Quality Material:Made of high-speed steel material, high hardness and heat resistant.