Walter 07-K 442 Finishing Drums 4-1/4", 80 Grit Walter Surface Technologies Sale! from 10900 /per Qty. Add to Cart This item is currently on backorder but you can still purchase it now and we'll ship as soon as more become available. Two-In-One Finishing Drums 4-1/4" x 4", 5/8-11" Arbor Hole, Line-Mate, 80 Grit SKU:WLT 07K442