Product never used, packaging damaged during transport. Unopened product, repackaged in our warehouses, in perfect working condition, warranty available. Convenient: Small size, light weight, easy to carry. Application: Sharpening family kitchen tool, wood chisel, jade, seals, or carving knives. Double side grinding: #400 side for coarse grit sharpening and #1000 side for fine grit sharpening. Effective material: This Whetstone plate uses diamond as abrasive material which is more effective than normal whetstone and less risk of damaging the edges. GUARANTEE: 24 hours customer service support. If you are not satisfied with the item, we will give you a free replacement or refund. Please enjoy your shopping. Diamond Whetstone, Knife Sharpener 400/1000, 150 * 63 * 1mm tool Honeycomb Outdoor Kitchen Grinding Wheel, Galvanized Steel Base 5/16 in Diamonds are the hardest sharpening media available. This diamond stone cuts aggressively and leaves a beautiful finish. It cuts 8 times faster