Made in the USA, The DMT 6" Inch Diamond Whetstone is a popular diamond stone that can be used to sharpen any knife or tool. 

The benefits of diamond stones are many. 

• Diamond stones offer the fastest cutting speed of all sharpening stones, ideal for speeding up cutting on dull knives. 
• An interrupted diamond surface,with recessed holes collects metal during sharpening to prevent loading and makes sharpening quicker and cleaner.
• Diamond stones are extremely flat and are longer wearing than other stones. 
• Diamond stones are the easiest to maintain, and require no lubricants such as messy oils or water to use. 
• DMT diamond stones are available in a range of grits, from extra coarse to extra extra fine. For finer grits, it is a common practice to use water stones after diamond stones for the finest polishing grits.
• Sold with plastic box that doubles as a stone holder. 
• Also available in 4" inch size.