Mounts into tool slot on CNC turrets easily adjustable with knurls installed the range is 1/8"–2". Opposing forces on knurls create little or no force on the machine. Just remove the two knurl lock screws, replace with bar grippers and use as a heavy duty bar puller. There are no gripper springs to remove when changing bar diameters. Just loosen the lockscrew, insert allen wrench and dial to the next size, preload approximately 1/8 rev., lock locking screw. Furnished with 1" shank without knurls or grippers. Minimum clearance required between turret and covers is 33/8".