Radius Gauges set includes four radius fillet gauges in four shapes with measuring ranges R0.3 1.5, R1 6.5, R7 14.5, R15 25. Key benefits Quick and accurate radii verification: check both convex and concave surfaces with two blades per leaf, helping ensure fit and function of parts. Durable and long lasting: made of stainless steel with hardness for reliability in demanding work environments. Low maintenance and long life: surface coated with anti rust oil to help prevent wear and corrosion. Easy to use and identify: 360 degree locking screw allows smooth unfolding and folding; leaves are engraved for fast identification. What this includes Four radius fillet gauges in four shapes covering the ranges R0.3 1.5, R1 6.5, R7 14.5, and R15 25. Materials and construction Stainless steel for durability and rigidity. hardness and good toughness. Smooth surface finish for precise measurement. Design and features 360 degree locking screw for simple use and secure positioning. Engraved leaves to quickly tell which radius is which. Each leaf has two blades for measuring both convex and concave radii. Antirust oil coating on the surface to reduce wear and extend life. Applications and use scenarios Metalworking and machining: verify fillet radii on parts, fixtures, and tooling to ensure proper clearance and fit. Automotive and machinery: inspect radii of brackets, housings, and covers to meet design specifications. Mold making and dies: check inner and outer radii of cavities and tooling paths. Woodworking and cabinetry: assess rounded edges and fillets on components and hardware. Specifications at a glance Contents: 4 radius fillet gauges in 4 shapes. Measuring ranges: R0.3 1.5, R1 6.5, R7 14.5, R15 25. Material: stainless steel, hardness. Surface treatment: anti rust oil coating. Features: 360 degree locking screw, engraving on leaves, two blades per leaf for convex and concave surfaces.