The Norton 4000 Water Stone is a very popular grit. The Norton 4000 Waterstone is a must have stone for woodworkers, knife enthusiasts and straight razor users. The Norton 4000 grit sharpening stone combines craftsmanship with the latest technology to produce a superior sharpening stone. This Norton sharpening stone is an excellent choice where speed and a razor-sharp edge are desired. Woodworkers, straight razor users and great chefs have trusted Norton quality for over 150 years. You too can depend on Norton Water Stones to meet all your sharpening needs. Please refer to our grit chart below for the suggested uses for this stone. Multifunctional Case and Complete User Guide Included. To see all Norton Water Stones please click the link below.