Design for longevity Crafted from a hardened alloy for wear resistance and rustproof durability, this tool features a doubleground stainless steel screw for reliable performance in tough conditions. Easy to use ratchet stop The integrated ratchet stop mechanism maintains a consistent clamping force for accurate measurements. The ABS function lets you set a reference point anywhere with ease. Switch between units easily Effortlessly convert between metric (mm) and inch at the press of a button. Includes a replaceable spherical anvil for enhanced functionality on curved surfaces. Key benefits Durable construction and rustproof performance for long service life Consistent force with a ratchet stop for repeatable measurements Quick unit conversion between mm and inches Replaceable spherical anvil improves measurements on curved surfaces Specifications and compatibility Material: Hardened alloy Screw: Doubleground stainless steel Features: Ratchet stop, ABS reference point, unit switch, replaceable spherical anvil Use scenarios Metalworking and machining: measure radii and diameters on curved parts with reliable consistency Automotive service: check fits and clearances on curved engine components or housings General fabrication and DIY: quick metrictoinch switching and accurate measurements on curved fixtures or surfaces