Sharper Tier Grinder - 2.5 " (63mm) BDD Wholesale - BDD Wholesale Sale! Login to view price. Size Single Box of 10 (Save $5) This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Sharper Tier Grinder 4 piece 2.5" (63mm) Qty available: 72 SKU: SprTier-63-2 Tweet