I found a company that sells aftermarket hedge trimmer blades. I ordered a pair of Sthil blades today. They have a 1 year warranty i couldn't believe it. And they are made in USA. I called and talk to the people at Prune pro. the blades are to limit the amount of browning on shrubs tips and the edge stays sharper than factory. the blades are heat treated after the edge is put on. www.prunepro.com Thought i would share with everyone.