Quality Material - The Flexible Installer Drill Bit features a premium black oxide coating that enhances durability and corrosion resistance Great for retrofitting homes with new cables, this extended bit saves you time spent fishing wire through confined attics, basements or crawl spaces. The bit grips wire firmly as you pull, ensuring a smooth wire pull every time without snags. Its thin shaft is durable yet pliable, designed for installing low voltage wiring without damage. Hotbar Flexible Installer Drill Bit 1/2 Inch X 54 Inch, Wire Pulling Fishing Auger Installer Drill Bit Fish Bit Pulling Wires Walls Ceilings Sidewalks F791324a A047 458c 9568 C0ad110947e8.0ecafe89cbafed1381243365b807c3b2 The Klein Tools model # 53718 Flex Auger Bit is 54 in. long, so with 16 in. between joists, in theory it is long enough to drill through 3 of them depending on the point of entry in the ceiling relative to the first joist Flexibility: It bends, twists, flips and can be used in tight spaces., Maximum flexibility of 90., Wider Application: The pointed opening of the cutter head is designed to be ideal for laying cables and various wires on finished walls and ceilings. Measuring 54 inches long, the flexible 3/4 inch bit can easily snake through tight spaces and corners, allowing you to pull cable or wire where a rigid bit cannot reach. IRWIN 1890772 3/8 x 54 Flexible Installer Drill Bit With Wood Auger Tip You can easily run metal or other wires through wall gaps in any direction without damaging the wall, and the unique design won't allow wires to tangle or slip.