Wood Twist Drill Bit Set Irwin hex shank 20 mm, 22 mm, 25 mm (10506627)

Set of three Irwin wood twist drill bits with hex shank in diameters 20 mm, 22 mm and 25 mm designed for drilling clean holes in timber and similar wood materials. The hex shank provides secure grip in chucks and enables quick bit changes in cordless and corded drills. Intended for carpentry, joinery and installation tasks where large-diameter, straight holes in wood are required.

Advantages

These Irwin twist drill bits combine large diameters with a hex shank for reduced slippage and fast bit replacement. Ground flutes and a geometry optimized for wood help evacuate chips efficiently, producing cleaner hole walls and reducing tear-out. The robust construction maintains concentricity for straighter holes during prolonged use in soft and hardwoods.

Suitable for

• Drilling large-diameter holes in construction timber and beams
• Creating holes for dowels, pipes or cable pass-throughs in wood
• Carpentry and joinery tasks that require quick bit changes
• Use with cordless and corded drills equipped with a hex-bit holder

Key specifications

• Material compatibility: timber and similar wood materials
• Bit diameters: 20 mm, 22 mm, 25 mm
• Shank type: hex shank for secure chuck engagement and quick changes
• Flute design: twisted/spiral flutes for chip evacuation
• Intended use: drilling straight, large-diameter holes in wood

How to use

Secure the selected hex-shank bit in the drill chuck or hex-bit holder and set the drill to an appropriate speed for the wood type—moderate speeds for hard timbers, higher speeds for softer woods. Position the bit perpendicular to the workpiece and apply steady, even pressure while drilling. Withdraw the bit occasionally on deep holes to clear chips and prevent overheating. After drilling, deburr edges if a smooth finish is required.

Usage recommendations

For best results, use a drill with sufficient torque for large-diameter bits and clamp the workpiece securely. When drilling hardwood or deep holes, periodically clear chips and allow the bit to cool to maintain cutting performance and prolong tool life.