Pride Abrasive Waterstones produce a superior edge finish with man-made Waterstones. Their water sharpening stones are softer than oil stones and use water to create a slurry, which gives you the level of abrasiveness you need at each stage of sharpening. Water stones wear concave with use and will need to be re-flattened periodically. 25mm thick x 76mm wide. The Pride Abrasive 400 Water Stone is perfect for repairing nicked, damaged or severely worn blades. For further refinement you can progress directly to the 1000 or 3000 grit stones. It is fast enough that you can use it to re-profile or create a secondary bevel. Softer than traditional oilstones – providing lapping action for superb results with low pressure Better choice for producing superior edges for planes and straight chisels Pride Abrasive was founded by Matt and Dorothy Hazlett, who began manufacturing abrasive stones in Bristol, Wisconsin, in 1978. Pride’s focus has been to produce the highest quality products at the quickest possible lead times at extremely competitive pricing with a customized approach to each customer. Pride has combined its nearly 40 years of knowledge with a unique water stone production process, resulting in a one-of-a-kind product for industries such as cutlery and woodworking. Utilizing their unique production process and top-grade materials, Pride has created water stones that are long-lasting, fast cutting, leave a mirror finish and – “gasp” – are flat within .007 of an inch right out of the box. Stones should be soaked prior to use approximately 15 to 20 minutes or till they quit breathing or stop bubbling.