MAKES AN OLD KNIFE CUT LIKE NEW- Sharpen the dullest knife in your drawer even Grandmas’ blunt butter knife. INCREDIBLE SUCTION CUP BASE– Safely secures to any smooth, clean surface ONE HANDED– Attach and Sharpen with just one hand TRULY VERSATIL– Sharpen blender blades, peelers, even rusty old secateurs SET AT THE PERFECT ANGLE– the v shaped tungsten carbide tooling is set at the optimum angle so there’s no skill required.