OREGON 25AP064G 64 Drive Link Micro Chisel Chain, 1/4-Inch Pitch Recommended saw size: up to 38cc bar length: up to 16-inch (41cm) Micro-chisel cutters feature small-radius working corners for excellent performance and easy sharpening Small size and light weight make 25ap easy to use and highly maneuverable Patented Chain Steel - OREGON OCS-01 steel is patented and provides greater durability, especially in cold cutting conditions 25ap 1/4-inch pitch chain, 050-inch gauge