Recommended RPM for each Carbide Tipped Hole Saw on page 82. Note: We recommend the use of a carbide tipped pilot drill when cutting ceramic wall tile. Pilot drill 123CT fits the SNAPBACK 2L or standard arbors 1L, 2L, 4L or 7L. Pilot drill 65CTPD fits the. SNAPBACK 2L or standard arbors 5L and 6L. See pages 7273.