The Moore & Wright Engineers Squares have a precision ground blade and stock and a blind rivetted construction. The blade has been hardened and tempered for longer life.
Grade B.
The Moore & Wright 40012 Engineers Square Grade B 300mm (12in) has the following specification:
Blade Size: 355.6 x 44.4mm.
Stock Size: 177.8 x 44.4mm.
Inner Working: 139.7 x 311.2mm.