Honing is a machining process that produces a precision surface on a metal workpiece (cylinder, barrels, tubing, etc.) by scrubbing a honing stone against it along a controlled path. Honing is used to improve the geometric form of a surface and can also improve the surface texture.Our name says it all. For over 30 years Imperial Honing has been delivering quality honing and gun drilling, boring and trepanning services to all major industries. Including honing of aerospace pieces, automotive honing and all other major manufacturing that work within precise tolerances and require quality results.  Our focus is high quality honing, boring, gun drilling & trepanning services, quick turn times and affordable pricing. If you’re looking for honing, boring, gun drilling & trepanning services in California, you've come to the right place.