Description Thin jaw design for ease of use Hole in square to hole extension bars securely Drop forged steel, polished in a thin plastic tray fits thin tool box drawers Lifetime warranty Sizes: 20mm, 21mm, 22mm, 23mm, 24mm, 25mm, 26mm, 27mm, 28mm, 30mm, 32mm, 35mm, 36mm, 38mm, 41mm, 42mm, & 46mm