Review on Genuine OEM Rancilio Rocky & MD40 Espresso Grinders - Burr & Screw Replacement Set by Racilio - A Perfect Fit for Superior Grinding Performance by Tara Williams

Purchased millstones with replacement screws for my 17 year old Rocky who still had the original millstones. As they wear out, grinding becomes much slower. After installing it, my grind became much faster and more stable. I recommend buying new screws, especially if the burrs will last for many years. A screw on the bottom ridge was very difficult to turn, and the slot fell off even with a fine-fitting screwdriver blade bit. I had to create a new groove with a Dremel cutting wheel to remove the old burr. Aside from that flaw, it was an easy replacement.