Lee Valley Starrett Premium Combination Squares

These are Starrett’s top-of-the-line combination squares. Useful for joint layout or machine set-up and as depth, height or marking gauges, they feature long-wearing forged steel heads paired with hardened steel rules with photo-engraved scales. The reversible rules have a satin-chrome finish that reduces glare and resists rust, while the precisely machined heads have a smooth enamel finish. Except for the 4″ size, all come with a steel scribing pin and a built-in level vial for determining level or plumb.

The 4″, 6″ and 150mm models are square to within ±0.001″ over the full rule length; 12″ and 300mm sizes are square to within ±0.002″. Imperial rules are graduated in the 4R style (with increments in 8ths, 16ths, 32nds and 64ths); metric rules are graduated in millimetres and half-millimetres on both faces. The 4″ rules are 1/16″ thick by 5/8″ wide; the 6″ and 150mm rules are 0.080″ thick by 3/4″/19mm wide; the 12″ and 300mm rules are 0.090″ thick by 1″/25mm wide. Rules are straight and parallel within 0.001″ per foot.

A protractor head and center-finding head are offered separately.

Versatile, classic designs. Made in USA.