PEC 4 Piece Combination Square Set - Model: U-40X Blade Length: 12" Protractor Head Type: Reversible Graduation: 32nds, 64ths.5mm, 1mm Type of Reading: Inch/Metric Can be used for set-ups, layouts, checking heights, depths, angle set-ups, etc. Square head and blade. Satin chrome blade. Made in the USA.