This open reel fibreglass long tape has 26 fibreglass strands which ensure less stretch for a better accuracy and a washable blade which is non corrosive and resists fading the blade is printed on both sides for easier reading a bi material grip for comfort and folding rewind crank with rotating fingertip knob makes blade rewind smoother and easier high impact abs case for a longer life with class iii accuracy blade width 12mm 12 in