This Stanley knife 210550 is a super heavy-duty trimming knife, that is made from a light aluminium material, ideal for carpet fitters and tradesman. It has a great designed shaped handle so it can be grip with ease and gives maximum comfort. The Stanley 210550 has a double notched blade location so the blade is held secure with in the knife giving it added safety and security. This Stanley 210550 has the added feature of a easy blade change system of a solid brass notched wheel that detaches the knife in two so you can change blades quicker then a standard trimming knife in its class. Stanley have made this 210550 knife to the best standards and comes complete with three heavy-duty blades that are stored inside the knife for quick and easy access.