Made from special carbon steel, these excellent-quality chisel-and-bit sets from Japan are attractively priced. The chisel bodies, accurately ground and hardened to Rc47-51, have polished outside faces and smoothly machined inner bevels. Designed for efficient chip ejection, the drill bits have well-ground cutting tips and spurs, and are extra long (between 8 3/4" and 11" overall) for compatibility with a variety of mortisers. Although the lower sections of the drills are Rc50-54, the shanks are soft enough to be easily docked if required (instructions included).