This Norton Aluminum Oxide India Benchstone is a coarse and fine combination stone that measures 11.5 x 2.5 inches. It produces keen, long-lasting edges. To improve sharpening and reduce clogging, use with oil. Ideal for clean deburring, this benchstone will produce sharp edges and quality finishes. This stone has a course and a fine side; just flip the stone over to use the opposite grit. The 2 for 2 nature of this stone provides great value and is an excellent choice for anyone who regularly sharpens away from home. If you're on the go and don't want to make a mess feel free to skip the oil; this stone can be used with only water.