Irwin Speedbor Wood Countersink Wood Drill Bit

Features

• Tapered drill with widened flutes for drilling fast, clean pilot holes
• Adjustable four-cutter counterbore cuts and clears chips quicker for fast, smooth countersinking
• Counterbore attaches to flats on shank with two hex screws for a secure fit, and can be adjusted for controlled pilot hole depth
• 1/4" Quick-change shank reduces slipping in standard chucks and is compatible with all 1/4" quick-change chucks, including impact drills
• Adjustable stop collar attaches to counterbore with two hex screws for a secure fit and can be adjusted for desired counterbore depth

Additional Information

#6

• Bit Diameter: 9/64"
• Overall Length: 3-5/8"
• Flute Length: 1-3/4"
• Counterbore Size: 5/16"
• Plug Size: 5/16"

#8

• Bit Diameter: 11/64"
• Overall Length: 4"
• Flute Length: 2-1/8"
• Counterbore Size: 3/8"
• Plug Size: 3/8"

Specifications

• Shank Size: 1/4"
• Flute Type: Spiral
• Hex Key Size: 1/8"