Grip 37 pc Deluxe Tire Repair Kit Use to repair punctured tires on vehicles, ATVS, hand carts, wheel barrows, and more. For use with steel belted radial tires. Plugging material is threaded into the open eye of a needle forming a part of the tool and inserted into the puncture. Includes: 1 pc t-handle insert tool, 1 pc t-handle spiral probe tool, 2 pc hex keys, 30 pc 4" string plugs.