IRWIN QUICK-GRIP® Quick-ChangeMedium-Duty Bar Clamps can be converted from a clamp to a 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.1 x Irwin Quick-Grip® Quick-ChangeMedium-Duty Bar Clamp 450mm (18in)Additional Information:Capacity (mm): 450Clamping Force (kg): 136Max. Spreading Capacity (mm): 665