Volcanics wallcovering smoothing tool is great for smoothing out creases and bubbles. Its also used as a ruler when trimming at ceiling, woodwork or baseboard straightly with a knife. Volcanics Precision Cutter with Safety Cap-The lightweight aluminum handle allows for a more comfortable grip. It fits in your hand like a pen, allowing you to hold it safely for optimal control and make agile cuts with ease. It also provides an opportunity for detailing what you want for all types of projects. An easy-change blade system lets you quickly swap blades according to your various needs. Common Usage for Volcanics Craft Knife-Stenciling, Cutting vinyl, Crafting miniatures, Model cutting, Sculpting foam, Making custom jewelry and Creating Christmas ornaments and holiday decorations. Tool Usage steps: Use the squeegee to remove the bubbles during installation; Cut the window film/contact paper desired size and trim the excess edges with the crafting knife. Warning: Keep out of the reach of children in case the knife may hurt them.