The SY Hardened Square series is a range of Japanese precision squares designed for professional work: carpentry, cabinetmaking, framing, instrument making and machining.

Each bracket is fully hardened steel to ensure perfect stability and a 90° angle that lasts over time .
The branches are securely assembled by spot welding , a process renowned for maintaining extremely stable geometry even under intensive use.

The SY series is indispensable for all high-precision squaring, fitting and marking checks.