Wen sold this line to Wagner Power Products (Wagner Spray Tech) several years ago. Wagner discontinued the line about two years ago. I have a model 6110 ... called Wagner customer service (1-800-962-6118 Ext. 7950) to find out that there are no blades available. They say you need a 4" long blade with a 1/4" shank, and that some people have had success by grinding down the shank of another blade that is close in size.