Coast Diamond 9" Folding Sharpening Knife Stone

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The SP425 is a folding, diamond grit blade sharpener that can hone, knives, scissors, axes, and other relevant tools. The SP425 is two sided with one side featuring a 400# diamond grit surface and the other featuring a 600# diamond grit surface. It also features a double folding handle that allows for compact storage of the sharpener without risk of damaging the grit. The Sharpener's textured nylon handle helps maintain a secure grip as you sharpen your tool.

With Coast's commitment to quality, the SP425 Sharpener is backed by Coast's lifetime warranty against defects in materials and workmanship.

  • Diamond Grit Surface - Good knives need to be kept sharp to be most effective as cutting tools. Coast's line of coarse and fine diamond grit surface sharpeners is designed to provide a number of ways to achieve that goal.


  • Blade Length: 4.0 in / 10.1 cm
  • Handle Material: Nylon
  • Length Closed: 5.0 in / 12.7 cm
  • Length Open: 9.0 in / 22.9 cm
  • Weight: 2.1 oz / 59 g

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