Screwdriver bit holder Makita B-57766, hex shank 1/4", shank Ø 4 mm, length 300 mm, 1 pc

Makita B-57766 is a 300 mm screwdriver bit holder with a 1/4" hex shank and a 4 mm cylindrical shank section. Designed to hold standard 1/4" driver bits securely, this single-piece holder extends tool reach and enables precise fastening in recessed, deep or otherwise hard-to-reach locations when used with drills, impact drivers or cordless screwdrivers.

Advantages

The bit holder provides extended reach while maintaining a solid connection between driver and bit, reducing wobble and improving accuracy. Its 1/4" hex connection ensures compatibility with a wide range of bits and quick-change chucks. With a 300 mm length it allows access to confined spaces without the need to disassemble assemblies, and the 4 mm shank section is suitable for many standard tool chucks and adapters.

Suitable for

• Fastening screws in deep recesses and narrow cavities
• Assembly work on furniture, cabinets and fixtures where extra reach is needed
• Maintenance and repair tasks in machinery, HVAC and automotive applications with limited access
• Use with drills, impact drivers and cordless screwdrivers for general fastening

Key specifications

• Shaft type: 1/4" hex bit holder
• Shank diameter: 4 mm (cylindrical section)
• Overall length: 300 mm
• Quantity: 1 piece
• Compatibility: accepts standard 1/4" driver bits

How to use

Insert a compatible 1/4" driver bit into the holder until it clicks or seats firmly. Secure the 4 mm shank in the drill or driver chuck or adapter, ensuring the holder is clamped tightly before operation. Use controlled speed and moderate pressure when driving screws at extended reach to avoid bit slip or cam-out. After use, remove the bit by pulling it out of the holder and inspect both holder and bit for wear.

Usage recommendations

For best results, use bits in good condition and match bit type and size to the fastener. When working in confined or deep areas, support the tool to reduce torque reaction and ensure straight alignment to prevent bending or premature wear of the holder. Periodically check for wear or damage and replace the holder if retention or concentricity deteriorates.