A precise and durable auger bit designed for clean, efficient boring in both dry and green wood. Manufactured in Japan by Star-M, the No.4 Power Auger Bit features a burr-free lead screw for easy centering, a twin cutting edge for reduced resistance, and an open spiral flute for excellent chip clearance. Ideal for green woodworking, chairmaking, timber framing, and more.

These auger bits are slightly longer and better suited to deep boring than the Combination Auger Bits No.6.

Crafted for use with power drills but also possible for use in a suitable hand brace, this bit features a hexagonal shank to reduce slippage in the chuck - with either 7mm, 10mm or 12mm hex depending on size (please see table below for reference).

Key Features:

• Burr-free centre lead screw for quick, on target starts
• Open flute for smooth chip ejection
• Excellent for deep boring 
• Hexagonal shank for secure grip in drill
• Made from high carbon steel
• Recommended for use in cordless/ electric drill but these can also be used in hand brace drill
• Made in Japan

Diameter (mm) |	Overall Length (mm) |	Working Length (mm) |	Hex Shank
10	250	190	7mm
12	270	195	10mm
14	290	210	10mm
16	290	210	10mm
18	330	240	10mm
20	330	240	12mm
22	330	240	12mm

About Star-M:
Founded in Japan in 1923, Star-M has become a leading manufacturer of high-quality drill bits and woodworking accessories. Known for their precision engineering and long-lasting performance, Star-M tools are trusted by craftspeople around the world – from cabinetmakers and carpenters to green woodworkers and chairmakers.