When manufacturing products that are kept in plastic bottles, sealing those bottles can be quite a hassle because the regulations demand that they be screwed tightly. The screw caps ingenious design makes it easy to open and close by hand, but tightening it is an altogether different story. This machine allows the user to screw the bottle caps so tightly that they cannot accidentally open during transport or storage. Also, if a bottle cap is screwed on too tightly, it can help by opening it, as it works in reverse, as well.