Oregon 38278 4.5 mm Chain Saw Sharpening Kit 1 assembled file frame 2 wooden file handles 1 round file and 1 flat file 1 .025-inch drop-center depth gauge tool File Diameter - 4.55mm 4 assembled file guide and frame 5 wooden file handles 4 round file and 1 flat file .025-inch drop-center depth gauge tool File Diameter - 4.55MM