INSIZE 4796-100 Machinist Square (Economic Type), 100x70mm

INSIZE's 4796 machinist square (economic type) is a DIN 875 grade 2 square made of carbon steel, sized 100x70mm. INSIZE states its squareness as 28μm measured on the inside edge and 30μm on the outside edge, with a blade thickness of 20 mm and a base thickness of 20 mm. INSIZE marks this economic-type square as not treated against rust and not hardened, so it should be wiped dry and lightly oiled after use. It is used for checking and marking right angles on metalwork where a grade-2 square is accurate enough.