Complete Tire Grooving & Siping Kit – All-in-one solution for grooving, cutting, and siping tires for oval track racing, dirt track, and demolition derby applications, Multiple Brass Tool Heads Included – Features solid brass grooving heads in sizes #3, #4, #5, #6, #8 plus a multi-blade tire siper head for maximum versatility, Hardened Steel Blades – Includes 12 hardened steel blades for each grooving head size, offering long service life with replacement blades readily available, High Heat Transfer Design – Solid brass heads provide excellent heat transfer for clean, consistent cuts through racing tires of all sizes, Ideal & Speedway Compatibility – Designed to fit Speedway Motors and Ideal Heated Knife tire groovers, with stainless blade retention hardware for precise depth control.