The Irwin IRW10507580 standard screw knife features an 18mm bi-metal blade. A performance knife featuring a manual screw for locking the blade in the required position, a stainless steel blade guide, cartridge for storing 2 blades, hinged end-cap, slim nose and textured grip. In addition, the screw fixture allows for convenient user control blade fixation.IRWIN Industrial Tools Ltd., a Newell Rubbermaid Company, produces high-quality hand tools and power tools accessories for metalworking and woodworking professionals.As well as the Record brand of hand tools, consisting of metalworking and woodworking vices, bolt-cutters, G-clamps, pipe tools and woodworking planes, the company has many other famous brands, including: Marples, Jack, Vise-Grip, Quick-Grip, Gilbow, Joran, Hilmor, Hanson, Strait-Line and Lenox.