IRWIN 1792768 Jobber Drill Bit, Double Milled Flute, 3 in L Flute, Straight Shank, 9/32 in Dia x 1 in L Shank       IRWIN Multi-material drill bits drill through just about any type of material like brick, block, tile, metal, wood, plastic and marble, they'll even drill through multiple materials at the same time. These versatile bits are designed specifically for rotary drilling, but are tough enough to be used with hammer drills.