【Bottle Capper】Equipped with an adjustable speed knob (up to 2500 rpm) and a forward/reverse switch for easy operation. A gentle start and gradual acceleration achieve consistent, tight seals on plastic bottle caps ranging from 10-50 mm 【High Efficiency】This handheld pneumatic sealer automatically stops rotating after fully tightening, preventing damage to the cap or bottle and ensuring consistent sealing every time. Reverse rotation is available 【Robust and Durable】This pneumatic capping machine is made of high-quality materials such as alloy steel and reinforced components, designed for long-term industrial use. High-quality core gears ensure high speed and sustained clamping force 【Stable Grip】Equipped with a durable metal claw chuck, it firmly grips interchangeable capping heads, preventing slippage. The included 6 capping heads are suitable for bottle caps with flat-toothed plastic caps 【Easy to Operate】The non-slip, lightweight design allows for comfortable use throughout the day, effectively reducing operator fatigue. It can flexibly tighten or loosen bottle caps on production lines or in repair shops