Repair damaged lug patterns on a go kart wheel that uses 2.5" bolt circle (American Wheel Pattern). The repair can be performed at the track with the tire still mounted on rim. Comes with the following items: - Drill Jig 3 X 2.5" -Aluminum Clamp Washer -3/8" X 1" Hex Bolt -17/64" Drill Bit Mounting the tool: Working from the backside of the rim, place the step on the jig through the center of the wheel. Position jig's pilot holes between the existing holes. Tighten retaining washer from the opposite side. Once Jig is mounted to rim, use the supplied 17/64" Drill Bit to drill 3 new holes.