Lightweight heated carbide blade cuts new edges into dull, worn-out knobby tires Refresh front or rear tire before installing a new one - extends the life of tire Tread Doctor Knobby Cutting ToolĂ– provides new traction on worn tires This easy do-it-yourself tool gives new traction for every ride Use for motocross, trail, ATV/UTV, enduro and racing Unit includes on/off switch and holding stand Made for enthusiasts by enthusiasts. TIRE TOOL TREAD DR