[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 precision, good toughness, smooth surface, to meet your needs. The stainless steel pressure gauge is coated with anti-rust oil and has a long service life. [Excellent design] The 360-degree rotating design allows you to easily unfold or fold and carry it with you. The specifications of each blade are clearly marked on the surface with technology, allowing you to easily and easily identify the leaves you need. The blade protector has a thumb and is easy to use. [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. [Wide application] It is widely used to check the correct size of drill bits, screws, , fasteners, valves, bearings, etc. And figure out what type of substitute. It is used to check the angle 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. Material:Stainless steel colour:Silver Package Contents: 1 x R0.3-1.5 Radius Gauge 1 x R1-6.5 Radius Gauge 1 x R7-14.5 Radius Gauge 1 x R15-25 Radius Gauge 1 x R26-80 Radius Gauge 1 x Feeler Gauge Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.