4pcs Stainless Steel Radius Thread Gauge R0.3-1.5/R1-6.5/R7-14.5/R15-25 for Tool and Die Makers

[Wide Application]: Used for home improvement, machine installation, and electrical equipment, it is suitable for designers, engineers, installers, and mechanics to measure the thickness or width of screws, valves, bearings, etc.
[Easy to Use]: The radius measuring instrument has two types of plates, each clearly marked, making it convenient to identify the plate you need. It can check both convex and concave surfaces. The convex pattern is used to detect the arc of a concave surface, and the concave pattern is used to detect the arc of a convex surface.
[Excellent Design]: The 360-degree locking screw design allows you to easily unfold or fold it. Laser engraving makes each plate easy to identify.
[Premium Quality]: Made of stainless steel, it is rust and corrosion resistant, high strength, good resilience, elegant appearance, and durable. NOTE: To prevent the thickness gauge from rusting and corroding, the surface of each ruler is coated with rust-preventative oil. No worries!
[Package]: The radius gauge set contains 4 radius thread gauges in 4 different shapes and measuring ranges: R0.3-1.5mm, R1-6.5mm, R7-14.5mm, R15-25mm.