Master Mechanic, 7 Piece, Rotary Percussion, Masonry, Drill Bit Set, Black Oxide, Carbide Tipped Designed For Use In Drills With Rotary Or Hammer Mode, Recommended For Drilling Cinder Block, Common & Hard Brick, Plaster, Ceramic Tile, Glazed Tile & Wet Or Dry Concrete & For Moderate Use In Marble, Granite & Concrete Over 6000 PSI, Includes: 1/8", 2-5/32", 2-3/16", 1/4" & 3/8", Organized In A Durable Case, Clamshell.