Product details:

The Groz 4-Pc. Engineers Square Set features one of the most accurate squares on the market, accurate to within 0.00063in. Features precisely ground and lapped blade and stock, plus self-locking rivets to permanently attach blade to base. These are useful for setting up and checking jobs where extreme accuracy is required. , Dimensions L x W in. 2 x 2, 3 x 2 3/8, 4 x 3, 6 x 4, Material Steel, Case Included Yes, Foldable No. Squares are accurate to within 0.00063in. Blades are permanently fixed to base by self-locking rivets to ensure rigidity of squares Precisely ground and lapped blade and stock ensures straightness and parallelism A groove on the inner corner of the stock aids in the clearance of burrs or dirt Set includes 2in., 3in., 4in. and 6in. squares in a blow-molded case Model Number: SS/A/2-3-4-6/ST. Age Group: adult.