The Stanley 12 inch square is constructed from stainless steel for a rust resistant long tool life. It has a precision-machined working surface for accuracy. A built-in scriber comes in handy for surface marking. Durably etched, hard-chrome-plated blades are rust resistant and made to last12 in. square has precision-machined working surfaces for improved accuracyBuilt-in scriber comes in handy for surface markingHigh-visibility yellow, die-cast handle with brass hardware for durabilityEasy-to-read vialUnique high visibility black blade with deep etchings filled with yellow paint12 in.