LENCO ground clamps have the largest contact area with the work of any clamp on the market. Serrated upper and lower jaws insure maximum bite to the work. A good ground clamp helps assure proper voltage for maximum weld results with all rods. Both upper and lower jaws of all three models are made from a high copper alloy assuring excellent current carrying ability. No steel jaws are used. A good ground connection assures better welds. Item Amp Cable Jaw 2 Model LPG-200 02011 200 No. 4 thru No. 1/0(25-50mm ) Mechanical Oval-Point Screw 13 oz. (370g) 1” (25.4mm) Model Code No. Capacity Capacity Type of Cable Connection Weight Opening 2 Model LPG-500 02031 500 No.3/0 thru No.4/0(70-95mm ) Mechanical Oval-Point Screw 38 oz. (11kg) 2” (51mm) 2 Model LPG-300 02021 300 No.1/0 thru No.2/0(50-70mm ) Mechanical Oval-Point Screw 25 oz. (709g) 1½” (38.1mm) A tough, brass hinge pin is durable and allows both jaws to carry current. The enclosed heavy duty spring assures a powerful bite on the work. The insulation on top and bottom provides extended spring life. All six of the LENCO ground clamps have the oval-point screw cable connection which is easy to install. No shim stock or pressure plate is needed.