These STANLEY 1992 Utility Blades are regular duty, general purpose blades that will fit all standard STANLEY utility knives, as well as other utility knives. Hardened and tempered for a high level of sharpness that will last they are ideal for use with carpet, vinyl and any other material requiring a stiffer and stronger blade. The dual-point trapezoid design makes them reversible meaning you will need to change to a new blade, less often. Supplied in a clear plastic case that can be screwed onto a flat surface for easy storage and blade retrieval.