10 of reach to fastener. 0° swing arc. Allows impact and pneumatic wrenches to reach fasteners buried in assemblies. Allows ratchet to swing free and clear where obstructions limit swing arc closer to the fastener Application Information. Serpentine belt bolts, engine bracket bolts, front cover bolts and timing belt bracket bolts. Power steering pump bolts, alternator bracket bolts, starter bolts and air conditioner compressor bolts. Sway bar link bolts and body mount bolts under carpet In very good used condition only used a couple of times.