Loggerhead BG8-01R-01 8-inch Bionic Grip Wrench Winner of 2005 Popular Mechanics Editor's Choice Award Instantly adjustable to cover 13 sized fasteners sizes and pipe/tubing from 1/2-to 3/4-inch outer diameter Patent pending auto-interlock system Easy to use-will not strip nuts and bolts; increases your hand's gripping power on the nuts/bolts/pipe or tubing 4-by-1-by-8-inches at 12.8-ounces