3.5" Marble and Paperweight Block. Originally designed as marble blocks, these steel tools come in standard sizes. The cutting edge of the block can be raised into the workpiece leaving very little to tweeze off. As an added feature, the same edge can be rotated to extend the life of the tool. A stainless handle and rubber grip are featured as well. The blocks can be waxed, but we recommend using linseed oil and cork. After buring in this treatment, the block should work carefree for many months.