Carefully crafted from high quality tool steel, these squares are accurate to BS939 Grade B standard.
Stock and blade are precision ground to ensure straightness and accuracy.
Spring steel blade is hardened and tempered for increased durability.
Size: 150mm (6in)
External size: 173 x 100mm
Internal size: 150 x 75mm
Stock thickness: 11mm
Blade thickness: 1.7mm