Tread Doctor Knobby Cutting Tool™ New Traction on worn tires! Lightweight heated tool cuts new edges into your dull worn out knobby tires. Refresh your front or rear tire before installing a new one. Extends the life of your tire. Tread Doctor™ uses a specially-designed heated carbide cutting blade to trim your knobby tires. This easy do-it-yourself tool gives you new traction for every ride! With a little practice you can cut the minimal amount of rubber off each time to get a new edge thus extending the life your tires. Get more traction for every ride! Heated carbide cutting tool for any knobby tire. Use for motocross, trail, ATV / UTV, Enduro and racing. Use Tread Doctor™ to cut tires for different conditions. Unit includes on / off switch and holding stand. Easily pays for itself with just one tire. CE and ROHS certified tire cutting knife.