Accud 60° Metric & 55° Whitworth Thread Gauge AC-925-062-52SPECIFICATIONS Range: 0. 25 6. 0mm & 4 62 TPI Metric 60 Screw Gradations: 0. 25, 0. 3, 0. 35, 0. 4, 0. 45, 0. 5, 0. 6, 0. 7, 0. 75, 0. 8, 0. 9, 1, 1. 25, 1. 5, 1. 75, 2, 2. 5, 3, 3. 5, 4, 4. 5, 5, 5. 5, 6 mm Whitworth 55 Screw Gradations: 4, 4 1 2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 18, 19, 20, 22, 24, 25, 26, 28, 30, 32, 36, 40, 48, 60, 62 TPI FEATURES Measure the pitch of thread Accuracy: 0. 07mm Metric 60 And Whitworth 55 Screw WEIGHT: 0. 08 Kg