Shapton 30000 grit (0.49 micron) GlassStone mortice chisel The square cut teeth on

The square cut teeth on this rasp cut faster and leave a smoother cut than rasps with the same grain density of triangular teeth

00027") along it's entire length

Radius across the width of the sole is 3”

which won't rust

They are supplied in a foam padded cardboard box

Shapton 30000 grit (0.49 micron) GlassStone mortice chisel The square cut teeth onThis 30000 grit (0. 49 micron) GlassStone (50403) is a extremely fine grit. There is diminishing benefit in sharpening to this high a grit, so many may find that this stone isn't necessary for most sharpening tasks, particularly for chisels that will be used for chopping or mortising. But for those that are looking for the absolute sharpest edge possible, this stone may be the answer. The Shapton GlassStone HR series of ceramic sharpening stones are