The hand-held bottle capping machine helps tighten screw caps from 10mm to 50mm in diameter. It is easy to set up, easy to use and provides good accuracy. The capper features an adjustable slip-clutch torque limiter. Just set the desired torque, place the driver firmly on the cap, and press the lever. When the desired torque is reached, the slip clutch engages, telling you to go on to the next bottle.