Narrow blade has mm and 1/2mm graduations. Starrett Millimeter Reading Double Square available at R.S. Hughes. Since 1954 - Trusted Starrett Millimeter Reading Double Square distributor. Call 877-774-8443 Designed for tool and die makers, this fine precision double steel square have adjustable blades, ideal for tight fits. Vintage Starrett Hardened Center Head For Combination Square USA Precision Machinist Square Early Starrett 6" Combination Square No. 4R Grad Hardened Rule Athol Large Combination Double Steel Square with hardened and ground head and blade Starrett - 9" Bi-Metal Blade Compass Saw | MSC Direct Millimetre blades are millimetre on one side and 1/2 millimetre on the other. A knurled clamping nut accurately locks the blades in any position.
