Apex AM-4MM-4 Power Screwdriver Bit Hex 4 in

Product Description

The APEX AM-4MM-4 is a hex-drive power screwdriver bit designed for use with power drivers and impact tools in trade and industrial fastening applications. With a 0.25-inch (4 mm) hex drive and a 4-inch overall length, this bit reaches fasteners in recessed or hard-to-access locations that shorter bits cannot. It is sold as a single piece and suits electricians, HVAC technicians, plumbers, and general contractors who rely on power tools for high-volume fastening tasks. The bit is built to transfer torque efficiently from the driver to the fastener without slipping or stripping under repetitive use.

This bit is a practical fit for residential and commercial service work where a longer-reach hex-drive bit is needed. Typical applications include driving hex-head screws and bolts on equipment panels, enclosures, ductwork, and mechanical assemblies. It is compatible with standard power drivers and impact drivers that accept a 0.25-inch hex shank. Trades that frequently swap bits on the job will find the 4-inch length useful for panel and cabinet work where standard-length bits fall short.

Key Features

• 0.25-inch (4 mm) hex drive fits standard power drivers and impact drivers with a 0.25-inch hex chuck
• 4-inch overall length provides extended reach for recessed fasteners and deep-set applications
• Single-piece packaging makes it easy to stock as a replacement or add to an existing bit set
• UNSPSC Code 27112814 for straightforward procurement and inventory classification

Compatibility

Designed as an OEM-style replacement or add-on bit for power drivers and impact drivers accepting a standard 0.25-inch hex shank.

Installation Notes

Seat the bit fully into the driver chuck before use to prevent cam-out or bit ejection under load. Verify the drive size matches the fastener head before applying power. Inspect the bit tip for wear or rounding after extended use, as a worn tip increases the risk of stripping fastener heads. No special tools or trade licensing is required, but follow applicable safety guidelines for power tool operation.