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: 100mm (4in)
External size: 120 x 75mm
Internal size: 100 x 56mm
Stock thickness: 8.5mm
Blade thickness: 1.7mm