These quality clock hands are to fit German carriage clock movements with push fit micro bore hand shafts. Like the German UTS round and square carriage clock movements. 

Hour hand shaft diameter 3.5mm + 0.02mm

Minute hand shaft diameter 2mm + 0.02mm

Second hand shaft diameter .051mm + 0.015

Alarm hand shaft diameter 5mm + 0.02mm

Hand size is taken from centre hole (shaft centre) to tip of minute hand.