For pricechoose optionsSelect Option 100mm (4in) 150mm (6in) 225mm (9in) 50mm (2in) 75mm (3in) Quantity Add to Basket The Faithfull Engineers Square has been carefully crafted from high quality tool steel. The stock and blade are precision ground to ensure straightness and accuracy, and the spring steel blade is hardened and tempered for increased durability.