For use with ARTU hole saws 02810, 02820, 02830 02840, 02850, 02860, 02870 and 02890 (sku nos 322.1645, 322.1652, 322.1660, 322.1686, 322.1694, 322.1702, 322.1710 and 322.1744).. Replacement Arbor & Pilot Bit For Artu Items 02805, 02810, 02820, 02830, 02840, 02850, 02860, 02870, 02890. For Use On Concrete Block, Cultured Marble, Brick, Cement Board, Wood, Drywall, Pvc, Fiberglass, Ceramic Tile, Plastic, Plexiglass. 2-1/4" Cutting Depth. 3/8" Shank. Cuts Clean Holes Smoothly In Materials Without Snagging. Designed To Work With Any Variable Speed Hand Drill. For The Builder, Tile Setter, Homeowner, Do-It-Yourselfer, Construction Worker And Other Professionals