Lisle engine cylinder hone. Used for precision honing of engine cylinders. Micrometer head assures accuracy in feeding. Clip-on stones and wipers are easily changed in a few seconds. Stones are available in 5 different grits, and racks are available for bores up to 10 1/4". #15000 comes with 1 standard rack (range 3 - 4 1/4"), 1 set each of 15500 coarse stones and 15510 medium stones, cleaning brush and dressing paddle, and a sturdy storage case.