Vise Grip® Cast Aluminum Pipe Wrench, 36 in, Drop Forged Steel Jaw no checkout and large knurled feed screw and large knurled feed screw knob give easy control of cutting pressure for clean cuts Models 117 and 118 include a self feeding AUTOFEED® cutter wheel that automatically cuts after tightening the knob only once Model 118 features a special knob for easier tightening of the feed screw per its wide Heavy duty cast aluminum housing is 40% lighter than cast iron and easier to maneuver I Beam handle and wide design provides better weight distribution Drop forged jaw is heat treated to resist distortion or breakage Easy spin adjusting nut is heat treated for durability Hammer head design provides a flat surface for hammering