Keep this handy 50mm grade II engineer's square in your apron pocket, where it will always be ready for action. This neat measuring tool is perfect for small-scale projects and for marking and checking squares in tight spots. Small in size but by no means any less accurate, it conforms to DIN875/II and is guaranteed square. It has four 90° angles: internal and external, outside blade to inside stock and inside blade to outside stock. The hardened and tempered blade and steel stock are ground and polished. This is a must-have tool for woodworkers, engineers and model makers.