can accurately measure internal and external screw threads with varied size. The thread pitch gauge can be folded into a pocket size and is lightweight and easy to carry around. The toothed edges are sharply defined and the numbers are stamped and easy to read. Features -Color: Silver. -Material: Steel. -Size: About 6.90X1.70X1.40cm/2.71X0.67X0.55in(Thread gauge). -Size: About 6.00X2.00cm/2.36X0.78in(Centre gauge). - One combination thread gauge model. Can be used for measuring the metric and inch screw thread. - Portable to use. The numbers are clearly marked and easy to read. - Made of steel. Surface polished smooth, good resilience, elegant appearance. - Easy to use, light and delicate, with precise measurements and simple design, which can be widely used and . - It is useful for checking tool angle while cutting threads in metal turning lathes. Package list: 1 x Screw Pitch Gauge 2 x 60 ° Center Gauges 1 x 55 degree centigradeenter Gauge