With razor blades being at the top of the list for workplace related accidents, Coast created the DX190 Pro Razor Knife knowing that the added double-lock protection will prevent the knife from accidentally collapsing. The DX190 includes a storage compartment in the handle for extra blades. A quick flip of the lever on the body of the knife allows you to replace blades quickly as needed. The knife is fitted with standard size double-ended utility blades.