Tools4Boards HONE DUO 400 Grit Medium Side is the perfect all round maintenance and polishing stone for sharp, smooth edges. Typically used as the third stone in progression from X-Coarse to X-Fine grit. 800 Grit Fine Side is the perfect first stone for final polishing after edge bevel and sharpness have been established. Typically used as the forth stone in progression from X-Coarse to X-Fine grit.

Product Features

• Premium Swiss-made diamond sheet mounted on exceptionally flat aluminum alloy backer 400 Grit Medium One Side/800 Grit Fine Opposite Side
• Extra thick 7/32″ (5.5mm) backer dampens vibration and will not flex and roll over dulling the cutting surface of the ski or snowboard edge
• Backer dimensions: 4 3/4″ (120mm) x 1″ (24.5mm)
• Unique diamond cluster pattern lasts longer than conventional diamond sheet
• Black matt textured finish allows stone to be used wet and provides superior diamond adhesion