Fits Models: Stihl 064, 066, MS192T, MS 640, MS 650, MS 660 and MS 661
Specifications: Crank Diameter: 0.3937" Crank Diameter 0.3937" Chainsaw Pitch 3/8" Teeth 7Bearing included
Additional Information: Use with 085-0017 Rim Sprocket 085-0017 Rim Sprocket