A retractable trimming knife (sometimes known as a Stanley knife) has numerous applications and uses with varying types of blades available. A trimming knife can, for example, cut rope, cable, carpet, vinyl, card, plastic, plasterboard, used to remove cable insulation and can even be used to remove burrs from aluminium. Fits snugly inside a pocket for easy access. The blades can be replaced, retracted for safety, and can usually be stored within the handle.