I have a HEZ3001S. I wasn't all that happy with it. It left some stringers behind, and I often had to go back with the line trimmer to clean my edges up. I went to mt regular dealer, and he was out of stock on replacement blades. Went to another dealer, got some blades and... WOW! What a difference! The guy sold me these other blades, not Redmax. The Redmax blades are 7 3/4" long. These blades are 8 3/4" long. I am guessing the extra length increases the blade tip speed enough that the machine now cuts a PERFECT edge, no stringers at all. The extra inch still clears the housing cover comfortably. This dealer told me that they had been special ordered, and the customer never picked them up. I bought a ton of them. Before the Edgit fans chime in... Edgit does not have a compatable unit for my Husky line trimmer. With these longer blades, the Redmax gives a PERFECT edge. Perfect. Just thought I'd share... don't know the manufacturer of the 8.75" blades, but a good dealer could find them for you.