[One machine with multiple functions] Radius gauges can accurately measure internal and external threads, with threaded blades of different sizes; convex patterns are used to detect concave arcs, and concave templates are used to detect convex arcs. [Stainless steel material] The use of high-quality stainless steel chrome-plated, the overall high temperature quenching treatment, high hardness, durable. Wear-resistant, rust-proof, good resilience, beautiful appearance, high , good toughness, surface, to meet your needs. The stainless steel pressure gauge is coated with anti-rust oil and has a long service life. [ design] The 360-degree rotating design allows you to unfold or fold and carry it with you. The specifications of each blade are clearly marked on the surface with technology, allowing you to and identify the leaves you need. The blade protector has a thumb and is easy to use. [Wide application] It is widely used to check the size of drill , screws, , fasteners, valves, bearings, etc. And out what type of substitute. It is used to check the of the tool when cutting the thread on the metal lathe, and accurately measure the internal and external threads with various sizes of thread inserts., Weight: 1.0361726314 pounds, Manufacturer: Duendhd