Starrett Square Blade Only for Combination Squares, Sets and Bevel Protractors - Ideal for Woodworking and Metalworking - 12" Length, Satin Chrome Finish - CB12-4R
This blade will fit any Starrett head according to size for all combination squares, combination sets and bevel protractors. 12", 18", 24" and 36" and 300mm and 600mm sizes are interchangeable (except No. 33J and No. 8 combination squares).