Ideal for electricians, plumbers and remodelers tasked with drilling through several types of materials, the 5-piece DEWALT DWA56015 Multi-Material drill bit set alleviate the need for professionals to carry and change multiple types of bits when drilling through different materials. They're great for working on light-gauge steel, PVC, wood, ceramic, tile, brick and cinder block often encountered on residential and commercial job sites. This set includes 1/4-, 3/16-, 5/32-, 5/16-, and 3/8-inch drill bits.