Square gauge summary Square gauge include feet ,angle plate and so on (Special tool to 90 degrees). Used to test the verticality of workpiece and equipment installing. Installation and scribing orientation of mechanical industry is an important measurement tools. It is characteristic of high accuracy, good stability, convenient in maintenance. Dimension :(We can make the products according to customer 's design ) Additional remark Some graphics and description in the instruction menual are just as a instruction, please according to real product. This instruction manual dosen't effect the product performance, safety and customer usage. If there is a difference between our product, for the promotion of our products , please according to the real product, no other explan Typeú¿mm) Squareness between measuring surface and datum surface Flatness and straightness of measuring surface Flatness and straightness of datumsurface Precision Grade (ª¦m) 00 0 00 0 00 0 100í-63 2 4 1 1 1 1 160í-100 2 4 1 2 1 1 250í-160 2.5 5 1 2 1 2 400í-250 3.5 7 1 2.5 1 2 630í-400 4.5 9 1.5 3 1 2.5 1000í-630 6 12 2.5 5 1.5 5. Size :500*100*40-3000*200*80mm Packing :Wooden box Detalis :7-30days after you order.