General description The Moore & Wright 336-6R Firm Joint Jenny Caliper is a precision measuring tool designed for internal measurements in various DIY and home improvement tasks. Manufactured from polished tool steel, it features a large-headed nut and screw assembly that ensures a firm, rigid friction joint with no play, providing accurate measurements. The caliper includes an offset leg holding a hardened, round adjustable point, along with a locating spur on the straight leg for added stability. Technical specifications Size: 150mm (6 inches) Measurement range: 0 - 150mm (0 - 6 inches) Effective leg length: 150mm (measured from the joint assembly) System of measurement: Metric Type: Firm joint caliper Compatibility and accessories Designed for internal measurements in DIY, woodworking, and home improvement projects Compatible with standard hardened points and accessories for calipers Installation No installation required; ready to use out of the box. Ensure the screw and nut