I purchased this new and used it twice. There are some sharpening marks on the whetstone, but the performance is fine and it's still in usable condition. The following is the manufacturer's description: ・The Work Sharp Precision Adjust Knife Sharpener is an angle-guided, 3-sided sharpening jig & clamp-style sharpener that makes manual sharpening faster, easier, and more precise than ever before. ・Adjustable and repeatable - Sharpening angles can be easily adjusted from 15° to 30° in 1° increments. ・Triple Rods - Quickly index between coarse diamond and fine ceramic stones. ・V-Block Clamp - Securely and consistently holds knives with a removable clamp. Sharpener Whetstone Sharpening Polishing Sharpener Knife spyderco Spyderco benchmade Benchmade Yamato Michi (Mountain and Road) Hano Kuromaku (Blade Black Curtain) Shapton