From Weber: "We designed the EG-1 from the ground up, centered around the burrs. Given that burr-centric focus, we offer three different burr sets, providing three different, near-zero retention grind profiles. The Core (DB-1), which currently ship with all EG-1s; The Ultra (DB-2), built to be the ultimate for pour-over coffee; And The Base (DB-3), our burr set utilized in our original MK1 EG-1s." This is the DB-2, the 'Ultra Low Fines' burr set which is focussed on delivering a sharper grind distribution with less emphasis on fines. What does this mean? It means these burrs are skewed towards filter. Grinding for espresso with DB-2 burrs will be difficult, but not impossible. What grinder does this burr set fit? Weber Workshops The EG-1 Mk.1, Mk.2 & Mk.3 It goes without saying that replacing the burr set in your grinder is done so at your own risk, take time and care - follow manufacturer advice for the disassembly of your grinder.