3" or 4" MINI VISE Clamps like a pit bull, this general purpose 4" hand-held vise will come in handy when you're on the job. 1 3/8" jaw; overall length 4.25". Jaw opens to 1" Over all length from top to bottom - 4.25 inches - hand holding area is a little less than 2.5" Jaw opens to approximately 1 inch - jaw itself is 1-3/8 inches long Carbon steel construction for dependable use; clamping area has texture for more secure grip Clamp will leave your hands free to do your work With adjustable wing nut closure - turning wingnut opens and closes the jaw