ROBERTS 3-In-1 Carpet, Vinyl & Utility Knife is the premier knife among installers due to its versatility. This knife accommodates carpet, utility, trimmer, hook or concave blades. With a quick blade change, it can be used to install carpet, LVT/LVP - or as a utility knife to cut twine and cardboard. It features a patented insert with 3 positioning options according to the blade type and cutting use. Position 1 sets the metal insert for use with a carpet blade. Flipping the metal insert allows it to be used with a utility blade. Position 2 is used for LVT/LVP applications, and Position 3 is for use as a utility knife. The molded comfort grip and pinky hold increase leverage and pulling power. This knife features in-handle blade storage for added convenience, storing plastic 10-packs and up to 25 single blades.