Please see images for functionality of set. Some stones are broken. Pretty complete set for the year. The Ammco Model 1000 Cylindrical Bore Honing Set is a high-quality hand tool designed for automotive use. Made by AMMCO, a trusted brand, this set includes all the necessary components to hone cylindrical bores with precision and ease. Ideal for professionals and hobbyists alike, the Ammco Model 1000 Cylindrical Bore Honing Set is a valuable addition to any workshop.