Relton REL-GRT-5-4 5/16" x 2-1/2" Groove V-Tip

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Percussion or rotary-only, the Groo-V Tip bit 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 drill press-supported drill motor is recommended for drilling hard metal.)
Diameter: 5/16"
Overall length: 4"
Drilling Depth: 2-1/2"