Round files for sharpening chainsaw chains. 

• 3.2mm file fits 71 chains 

• 4.0mm file fits 61 and 63 chains 

• 4.8mm  file fits 23 and 25 chains

• 5.2mm file fits 33 and 35 chains 

• 5.5mm file fits 40, 45 and 46 chains 

Stihl round files can be used alone, with an added handle or fitted into a 2 in 1 chain sharpener.