Used to countersink and counterbore for the heads of screws in woods, plastics, and non-ferrous materials. Made of Carbon Steel and heat-treated for long tool life. The countersink is held in place with 2 hex socket set screws fastened into the flutes of the drill. This countersink can be mounted on taper point, brad point and regular point drills.

• Countersink
  Diameter: 7/16"
• Drill Hole Diameter: 13/64"
  
• Overall Length: 7/8"
  
• NBH Number: 12677
• Item Number: FUL C10