The 12 inch combination square is durable and accurate. Its blade is made of hard chrome, which is coated to resist rust for long life. With built-in scriber for surface marking, easy-to-read vial, and die-cast metal handle, this tool allows for efficient measuring and marking. Embossed hard-chrome blade is coated to resist rustBuilt-in scriber for surface markingBlack die-cast metal handle for durabilityEasy-to-read vial