PONY JORGENSEN E-Z HOLD 18' 450MM MEDIUM DUTY/SPREA AC33418Jorgensen 18 Inch One Handed Spreader Clamp Information: The first bar clamp to expand by joining two clamps together with no tools or added accessories needed. The patented head design allows any two Jorgensen Bar Clamps to be joined together for greater clamping capacity. By quickly flipping the head, you join two clamps together and also increase total clamping capacity by 6 Inch over the original two clamps. Example: Two 12 Inch Bar Clamps joined