Percussion or rotary-only, the 1/4" x 4" Groo-V Tip bit from Relton makes holes in almost all materials. Engineered for drilling hard materials, these specialized Ram Tip Bits have a serrated carbide tip, which penetrates faster - up to 50% faster than standard masonry bits! A drillpress-supported drill motor is recommended for drilling hard metal.
Groo-V Tip multi-purpose bits are designed for use on: tile, hard metal, plastic, wood, marble, granite, and masonry.