Very useful #400 grit diamond stones for coarse sharpening and, crucially, for lapping and flattening your waterstones. An adhesive layer of monocrystaline diamond chips is backed onto a 10mm thick block of aluminium giving a solid, stable and flat product.
Always use wet, and work gently. For lapping, smooth off wetstones in a circular, figure-of-eight action.
- #400 grit
- 21 x 7.5 x 1cm
Niwaki Tip: A great solution for flattening your stones.