Unique design: The cutter of the inner tape holder is hidden inside the body, and the side gear is twisted to cut the film, which is safe and reliable. There is a non-slip base at the bottom of the fuselage to provide extra stability, suitable for any home or office . Safe side cutter blade design: the side blade is hidden in the body when not in use, and the side blade switch has a built-in child protection function. If you finish the work, please make sure to put it in the "off" state. So you have to apply some force to open it with "on" . Wide range of uses: commonly used tape, kapton tape in the semiconductor field, heat-resistant tape and 2mil thick polyimide film, as well as ordinary transparent tape, packaging tape, tape for manual accounting, etc. . Allowable width and inner diameter of the tape: The total width of the tape should not exceed 1.95 inches. And the 1" and 3" cores have the same length of 2 inches, and the core of the side film holder is also 3". The maximum thickness of the tape can be 0.82". The thickness of the film inside and outside the film holder is 0.7" . Packaging: Our packaging includes a dispenser with 1" and 3" cores. The packaging comes with instructions for use. Please read carefully before use(without tapes&pens) .