NT's cartridge-type, heavy-duty snap off blade knife has an aluminum die cast anti-slip contoured grip. Durable and light holder is made of 100% post-consumer recycled material and coated with electrical-acrylic metals for water resistance. Holding up to 6 refill blades, this cartridge type multi blade knife is convenient for jobs that require constant supply of new blades. Just remove the old blade and a new blade will automatically pop up into position. Convenient snap off utility knife has an extra high quality stainless steel sliding track which allows the blade to glide in and out smoothly. Ratchet Auto-Lock slider has an added screw-stopper to insure that blade will hold securely in position for maximum cutting efficiency. The blades used in this snap off knife are made from high quality carbon tool steel and produced through multiple stages of precise process to obtain the ultimate sharpness and optimum edge-retention. This heavy-duty cartridge knife comes with two carbon steel blades and a triangular blade snapper. Good for DIY projects, construction such as drywall, roofing, flooring, Industrial application, warehouses, factories, etc. Made in Japan.