These rules interchange with those supplied in Starrett combination squares and sets. Made of hardened steel with photo-engraved markings, they are offered with either a regular finish or a no-glare satin-chrome finish that resists corrosion.
Imperial rules are graduated in the 4R style (with increments in 8ths, 16ths, 32nds and 64ths) and metric rules are graduated in millimetres and half-millimetres on both faces. Imperial/metric rules are graduated in 64ths and millimetres on one side, and 32nds and half-millimetres on the other.
The rules for the 6″/150mm square heads are 0.080″ thick by 3/4″/19mm wide; those for the 12″/300mm heads are 0.090″ thick by 1″/25mm wide. Rules are straight and parallel within 0.001″ per foot.
Made in USA.
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