DIB1050 Diablo 1/4 in x 18 in Installer Bit Diablo’s Installer Drill Bits offer premium performance and superior life in wire installation projects. An ultra-sharp tip maximizes durability for fast, straight holes in clean wood or stacked lumber. Black oxide coated flutes prevent debris build-up for fast chip removal. The small hole in the flute makes feeding cables and wires effortless. The 3-Flat Shank provides extra stability by eliminating spinning in the drill chuck. Ultra-sharp tip for fast straight holes in clean wood or stacked lumber Black oxide coated flutes for fast chip removal 3-Flat Shank eliminates spinning in drill chucks Small hole in flute for easily pulling wires and cables through walls, ceilings and floors Extended length for access in hard to reach areas Maximum performance in cordless and corded drill drivers DIAMETER : 1/4 in LENGTH : 18 in SHANK : 3-Flat WORKING LENGTH : 3 in