Walker A 440 tuning fork
John Walker tuning forks, made from the highest quality Sheffield steel, are designed for accuracy, not loudness. They are guaranteed for life to deliver perfect pitch if properly maintained.
* Made from hardened, tempered (spring) steel
* No welds (unlike cheaper forks stamped from wire!)
* Calibrated to national lab standard three times during manufacture
* Accurate to +/- 0.05Hz.