The Vent Rib Repair Tool consists of two claws that straddle a brass bar. The brass bar, which is about three inches long, 1/2 inch high, and 1/4 inch wide, has a milled cut out along the bottom side. A crosspiece connects the tops of the two claws. An elevating screw runs through this crosspiece and bears against the top of the brass bar. A rubber O-ring holds the two claws against the crosspiece and against the rib when the tool is used. Other than an Allen wrench to turn the elevating screw, that's all there is to it! The Vent Rib Repair Tool provides a quick and easy method for straightening the vent-rib on most shotguns. It also saves scratching or denting of the barrel. A great time-saver for the professional Gunsmith and will pay for itself with its first use by the hobbyist. Bridge: Machined brass (3" long, ¼" thick) Jaws: hardened steel (1½" long) Black