These Irwin Quick Grip mini clamps deliver up to 150 lbs (63 kg) of clamping force despite their pocket sized proportions. You can adjust the jaws of the clamp in various ways to suit the job, and use this tool with one hand. Thanks to the smooth, non-marring pads, the materials you're working with won't get damaged by the clamping action, and you can easily remove the pads for cleaning or to get a tighter grip