A quick change system which converts clamp to spreader in seconds, with a clamping hold load of 135Kg A lockable swivel jaw feature which enables uneven surfaces to be clamped Square XP-style protective pads protect the work surface Heavy-duty construction which makes for a durable, long lasting clamp Improved quick-change screw mechanism allows for easy conversion to a spreader, Weight: 2.8219169536 pounds, Manufacturer: Quick-Grip