52 PCS Metric 60 Degrees +British 55 Degrees CR Stainless Steel Thread Gauge

1. The scale on the surface of the ruler is clear, clear and easy to use.
2. Plating shell, anti-rust, beautiful and generous.
3. CR stainless steel forging, high strength.
4. Notch design, easy rotation.
5. Purpose: for monitoring screw pitch of thread, one piece of screw pitch.