70 Grit Metal Double Segment - Round- Medium Bond Red

- Mid-fine metal-bond grinding segment for the second-to-last metal step — 70 grit sits between the mid-range cuts (40, 50) and the final 120-grit refinement, smoothing the scratch pattern left by coarser grits while continuing to expose fine aggregate. Standard step in the metal-bond progression before transitioning to resin polishing pads.

- Round (button) segment geometry with double-segment layout — the round segment shape (also called button) distributes cutting pressure across a circular contact patch, delivering a smoother scratch pattern than aggressive geometries like arrow or triangle. The double-segment configuration runs two round segments per shoe, creating more surface contact than a single button, extending tool life, and stabilizing the cut. Best paired with larger / heavier walk-behind grinders (25" and up) where the extra contact patch helps the machine pull weight.

- Engineered for medium concrete — medium-hardness concrete (typically 3,000–5,000 PSI, Mohs 5–6) is the most common slab type found on commercial and residential floors. The medium metal bond is balanced for this hardness to give steady cutting speed without premature wear or diamond glazing. The red color code is the universal industry marker for medium-bond tooling.

- The default choice when slab hardness is unknown — most contractors start a new job at 25 or 30 grit and progress through to 70 grit on the medium bond; only if testing or visible wear shows the bond isn't matched to the floor do they switch to harder (for soft concrete) or softer (for hard concrete) options. Run a Mohs scratch test if slab hardness is in question.

- Recommended starting grit for small-to-medium aggregate exposure — when the goal is exposed-aggregate finish at the small-to-medium stone size, 70 grit is the typical starting point per industry guidance. For larger aggregate exposure, start coarser (16 or 30 grit metal); for fine salt-and-pepper finishes, start at 120 grit. After this 70-grit pass, the typical sequence steps up to 120-grit metal, then into resin polishing pads beginning at 50 grit resin.