Description 12" L-Clamp - Super Heavy Duty | Case of 4 | JETSave Big when you buy case lot 4 per case. Only $282.84 per EACH!. Tempered drop forged sliding arm reduces clamping set up time - ideal for high volume production work Nickel-chrome plated rails are heat formed from cold drawn profiled steel Extra deep throats for maximum versatility High carbon Acme threaded spindle is spatter resistant Rails, sliding arms, and spindles 100% heat treated Replaceable spindles and pads Specialized pads available for JLHD and JLSD Series The ultimate in depth and strength 45% greater clamping pressure than our extra heavy duty clamps Serrated and V-pads available for special applications Ball Joint: 390299 Clamping Pressure: 4,840 lb Opening: 12" Pad Nut: 390298 Plain Pad: 390292 Rail Size: 1-9/16" x 3/4" Screw & Handle: 390297 Serrated Pad: 390293 Throat Depth: 6-3/4" V Pad: 390294