Drill Bit Holder MILWAUKEE Auto-Lock 152 mm MI4932471824

The MILWAUKEE Auto-Lock drill bit holder 152 mm is a magnetic quick-change extension designed to hold screwdriver and drill bits securely during installation and repair tasks. Its 152 mm length provides extended reach for fastening in recessed or hard-to-access areas while the Auto-Lock mechanism enables fast bit changes and ensures bits remain retained during use. The tool is compatible with standard hex-shank bits and is intended for use with drills and impact drivers in construction, electrical, and maintenance work.

Advantages

The Auto-Lock mechanism combines a positive locking action with magnetic retention to minimise accidental bit release and wobble during torque application. At 152 mm length the holder gives improved access to tight spaces without sacrificing stability. The precision-machined hex interface reduces play between bit and holder for consistent engagement with screws and fasteners. Constructed from hardened steel, the holder resists wear from repeated bit changes and high-torque applications.

Suitable for

• Fastening and loosening screws in recessed or deep-set fixings
• Installation tasks with drills and impact drivers on construction sites
• Maintenance and repair work requiring frequent bit changes
• Electrical and HVAC installations where access is limited

Key specifications

• Overall length: 152 mm
• Drive style: hex shank compatible with standard 1/4" hex bits
• Retention: Auto-Lock mechanism with magnetic assistance
• Material: hardened steel for wear resistance
• Compatibility: suitable for use with drills and impact drivers

How to use

Insert a compatible hex-shank screwdriver or drill bit into the holder until the Auto-Lock engages and secures the bit. Attach the holder to the drill or impact driver chuck or quick-change adapter as required. For removal, pull back the release sleeve (if present) or depress the locking feature to disengage the Auto-Lock and withdraw the bit. Always ensure the bit is properly seated before applying torque and verify the tool is set to the correct speed and torque settings for the fastener and material.

Usage recommendations

Use with quality hex-shank bits to maintain secure engagement and reduce wear. Inspect the holder and bits regularly for signs of wear or damage, and replace if retention performance degrades. When working with impact drivers, confirm compatibility and monitor for increased stress on the locking mechanism. Store in a dry environment to prevent corrosion and keep the Auto-Lock mechanism free of debris for reliable operation.