Road Warrior 18" Big Rig Truck Aluminum Tire Checker Thread Thumper Bat ID#: YZ0016A Original Price:$29.95 DESCRIPTION: Brand new, never used! Retails for $29.95! Corrosion resistant heavy-duty aluminum 'billy' bat with tapered thermal-rubber grip and a wrist-strap that doubles as a storage hanger. Basically you are listening to the sound it makes, and feeling the way it reacts in your hand when you strike a truck tire. A properly inflated tire will produce a sharp "thwack" sound when hit, and the thumper will bounce back sharply. If a tire is *significantly* under-inflated, the sound will be more of a dull thunk, and the thumper will be slow to bounce back. Heavy-duty 2mm thick wall will last for years. 18 inch overall. Approx. 12 oz.