Fowler 52-105-004 Steel Outside Spring Caliper with Polished Natural Steel Finish, 4" Length

Fowler 52-105-004 4" length steel outside spring caliper with polished natural steel finish and quick positive adjustment. The adjustment screw is centrally located; legs are well balanced with uniform tension. Polished natural steel finish. The ends are fully rounded and points are fully hardened/tempered, high carbon steel legs heat treated. Fowler's Spring Calipers and Dividers are fully hardened with tempered joints, springs and washers. This spring caliper has polished natural steel finish. Outside Spring Calipers meet Federal Specification Type II, Class I. Inside Spring Calipers meet Federal Specification Type I, Class I. Spring Dividers meet Federal Specification Type A, Class 2 and supplied with a plastic point protector.This product has 1 year warranty offered by Fowler precision. If you experience any problem contact Fowler directly for warranty claims. Fowler, an American company, manufactures inspection and measurement instruments such as electronic indicators, calipers, bore gages, and digital scales. The company, founded in 1946, is headquartered in Newton, MA.Calipers measure the distance between two opposing sides of an object. They make inside, outside, depth, or step measurements, according to their type. The simplest calipers have two legs to mark the two points and require a ruler to take the measurement. More complex calipers use two sets of jaws instead of legs and have up to two graduated scales. Vernier, dial, and digital calipers give direct and accurate readings and are functionally identical, having a calibrated scale with a fixed jaw, and another jaw with a movable pointer that slides along the scale. Calipers are commonly used in architecture, metalworking, mechanical engineering, and machining.