Prec. hairline square slide ruler
Precision bevelled square with sliding ruler
Design: Rectangularity, parallelism and evenness tolerances. For highest accuracy. Reading parts matt chrome-plated, straightedge 7 x 7 x 100 mm, slidable, adjustable angle up to ± 5°. Supplied in a wooden box.
Application: For checks and inspection work using the light-gap method.