Strong Hand Welding Clamp - 4 1/2 inch Utility Clamp Strong Hand 4-IN-1 Utility Clamps are the Only Sliding Arm Clamps in the industry with the removable/reversible clamp arm, and the threaded jaw hole for adding exclusive Strong Hand accessories. The 4-IN-1 Clamp adapts to create a: Pipe Clamp, Spreader Clamp, and Step-Over Clamp. 1 Clamp...4 Applications. Features V pad for pipes and extender block included Extender block allows for access in step-over applications Removable, reversible arm for spreading Threaded hole on base for mounting both attachments, in either clamping direction Specs Opening: 4 1/2" (with no attachments connected) Throat: 3 1/2" Clamp pressure: 500 lbs. Rail size: 5/8 X 5/16" Treaded hole: 5/16 - 18 Free standard ground shipping within continental U.S. Availability: Usually ships the next business day. STRUD45-C3Mfg Industrial Price: $12.47Cyberweld Price: $11.25 All prices shown are in U.S. Dollars The Cyberweld® name, logo and the slogan "Weld with your mouse"® are registered service marks of: J.W. Goodliffe & Son, Inc. 1900 E. Elizabeth Ave. P.O. Box 4370 Linden, NJ 07036 (800) 419-0580 FAX (908) 486-9366 Phone answered live M-F 8:00am to 4:30pm EDT © 2000 - 2010. All rights reserved.