Brass Sniper Cutting Head for your Tread Doctor.Adds Tire Sniping ability to your Tread Doctor Knobby Tool.Snipe Tires for custom patterns. Perfect for Flat track, Enduro and Motocross.Fits any Tread Doctor Heating Iron.Includes one brass cutting head #3Cuts Groove Width of 1/4″Includes 12 replacement cutting blades 5/32″ size. Depth of cut is adjustable.UPC:632194723856Dirt Bike Magazine Tested and Approved.