If your chainsaw model should not be included in the manufacturer's list, you can determine the measures using the following formula: 1/4'' a=12,7mm .325'' a=16,5mm 3/8P'' a=19mm 3/8'' a=19mm .404'' a=20,5mm Pitch How to determine the pitch of your chainsaw: Take the distance from the middle of one riveted bolt to the middle of the next but one and divide the result by two. This is the pitch in millimeters which is internationally stated in inches. 1,1 1,3 1,5 1,6 Groove Gauge How to determine the groove gauge: As for 3/8 hobby chains 1.3 mm and less frequent 1.1 mm occur. As for 325 and 3/8, 1.3 mm, 1.5 mm and 1.6 mm occur (1.6 mm for ). The number of the Drive Links Please count the number of the drive links on your chain. Vollmeißel (if possible) Moreover, you have the choice between Halbmeißel (higher resistance) and Vollmeißel (more power). Please indicate your chainsaw model: :