NEW! Tools4Boards HONE DUO 100 Grit X-Coarse Side may be used in place of a smooth (fine) finishing file. Perfect deburring stone for removing case hardening from edges caused by hitting rocks or grinding machines and ideal for de-tuning shovel and tail. 200 Grit Coarse Side is the perfect maintenance and deburring stone for sharp, smooth edges. Typically used as a second stone in progression from X-Coarse to X-Fine grit.