Standard 200/600 Grit Diamond Stones last an average of 300 sharpening sessions, leaving all your blades with an amazing working edge It can be secured to any flat surface with either a C-clamp or directly mounted to a work surface through the 4 predrilled holes in the base Lightweight and compact for easy storage or travel MADE IN THE USA: Wicked Edge has produced highest quality precision knife sharpening systems since 2007 LIMITED LIFETIME WARRANTY: We are proud of our sharpening systems and we stand behind our products The Carbon - WE40 Precision Knife Sharpener is perfect for those who are looking for a lightweight, simple sharpening system that provides incredibly sharp edges. Whether you're taking it in the field, leaving it in your shop, or tucking it away in a kitchen cupboard, the Carbon is always ready to take your edge to a wicked level of sharpness.