PowerLock Tape Rule has a 12' x 1/2" blade with English/metric scale. Durable die-cast metal case stands up to rough handling. Entire blade coated with heavy-duty Mylarr polyester film for extended life. Corrosion-resistant Tru-zero end hook ensures accurate measurements and does double-duty as a pivot for drawing circles and arcs. 16" and 19.2" stud center markings simplify framing jobs.