4R GRADUATIONS: Measures 8ths, 16ths, 32nds, 64ths. METRIC: Also measures every .5, 10, 20, 50, 100mm. DURABLE: Polished Stainless-steel finish. ETCHED GRADUATIONS: Ultra fine black graduations for easy reading and long life. DIMENSIONS: 6-inches x 3/4" (150mm x 19mm). GENERAL TOOLS: We're a recognized leader in designing and developing specialized precision tools dedicated to delivering exceptional customer service. We encourage artisans and DIYers to work smarter, measure better, and repair more productively. 6 Rigid Grads: Side 1 (Mm, .5Mm), Side 2 (10, 20, 50, 100), Width 3/4" "