The Irwin Quick-Grip® Quick-Change™ Bar Clamps can be converted from a clamp to spreader in seconds, with a clamping hold load of 136kg. The lockable swivel jaw enables uneven surfaces to be clamped and it is fitted with square XP-style protective pads to protect the work surface from damage. Enhance your clamps with a wide range of Quick-Grip® Clamp Accessories. Technical Specs Clamping Capacity: 150mm (6in).Spreading Capacity: 360mm (14in).Clamping Force: 136kg.