These are good, sharp blades that cut through small branches like butter. However, it is advertised to fit a Ryobi 8" poll trimmer, but it doesn't really fit. My Ryobi came with a 33 link chain. This is a 34 link chain. That one extra link means my chain adjustment is run out almost to its limit. As this chain wears and stretches I have no room to take up the slack.