Hardened And Tempered Chrome Vanadium Steel With Precision-Machined Slide And Jaws For Smooth Adjustment And Accurate Fit. Wide Handle For A Secure Grip And Comfort During Heavy Use. Dual-Sided Metric And Imperial Laser-Etched Graduation. Phosphate Electroplated And Oiled For Highly-Durable Corrosion Resistance.PTDTSTWR11