Swivel, tilt, and rotate your vacuum lifter to grip irregularly shaped or textured items. These mounts have ball-and-socket joints that lock in place, so you can precisely position your suction for an ideal grip. Use the threaded arms and three thread adapters to connect vacuum lifters or threaded vacuum cups (both not included) of various sizes. Because the arms are hollow, you can run vacuum lines through them and directly to vacuum cups. Alternatively, use the plug near the bottom of the arm to route tubing with compressed air out the side to a vacuum lifter.