3x Pro 4mm Round Chainsaw Saw Chain Files Filing Sharpener For Woodwork New OOTDTY   Features: High carbon steel round chain saw file It has a round shape, smooth cut and straight tang Start filing by tightening the tension on chain to firmly support cutters and file from inside to outside of cutter 4mm round file suitable for chains Shank Diameter: Approx. 4.0mm/ 0.16" Chainsaw File Length: Approx. 245mm/ 9.65" Package Included: 3 x Round Chainsaw Saw Chain Files