product information:
Brand: duratec
Measurement accuracy: 0.01
Specifications: 867 square ruler 3 inches (length 8cm wide 5cm),867 square ruler 4 inches (length 10cm wide 10cm),867 square ruler 6 inches (length 15cm wide 15cm),867 square ruler 8 inches (length 20cm wide 20cm),867 square black 8 inches (length 20cm, width 20cm),set A (3 inches, 4 inches, 6 inches, 4 pcs each),set B (4 inches, 4 pcs),set C (4 inches, 2 pcs, 6 inches, two),set D (4 in 6 inches)