Dewalt DW5578 1/2 in. Diamond Drill Bit


Install a safety grab bar or towel ring on your tiled wall with the aid of a DEWALT 1/2 in. Diamond Drill Bit. The welded-diamond tip is designed to bore through abrasive, dense tiles, including glazed porcelain and ceramic in addition to rock-hard, solid-body porcelain. It operates at high speeds courtesy of reverse-spiral threads that allow continuous water cooling so you can complete drilling work quickly and cleanly. Plugged material is easily removable from the core-ejection slot so you can make repeated cuts without slowing down.


  • Ideal for use by bath and kitchen installers and commercial and residential plumbers
  • Reverse spiral thread allows continuous water feed for longer life and increased speed
  • Creates 1/2 in. holes in tile walls and countertops to install accessories like safety grab bars, water supply lines, towel bars, toilet paper dispensers and paper towel holders
  • Hardened alloy steel construction stands up to repeated use and high-heat conditions with proper water cooling


  • Assembled Depth (in.) 4.75 in
  • Assembled Height (in.) 1.375 in
  • Assembled Width (in.) 3 in
  • Bit Diameter 1/2 in
  • Bit Length (in.) 2.17
  • Bit diameter (in.) .5
  • Drilling Depth (in) 2
  • Shank Diameter 9.8 mm
  • Bit Material Diamond
  • Color Family Silver
  • Cordless/ Corded Cordless
  • Drill Bit Type Specialty
  • Drill Bit Type(s) Included Specialty
  • Individual/Set Individual
  • Material Application Ceramic Tile
  • Min Chuck Size Required 1/2 In.
  • Self-Feeding No
  • Shank Style Straight
  • Shank Style Straight
  • Tools Product Type Power Tool