All details of these Dial Gauges conform to DIN EN ISO 463 / DIN 878. Except for the shockproof system all technical features of the Dial Gauge MU 52 ST are the same as for the MU 52 T Dial Gauge. Effective impact protection protects the Dial Gauge MU 52 ST even from hard impacts on the spindle, thereby reducing the risk of damage of the teeth.