Product Description
Milwaukee 3/8 in. x 12 in. Selfeed Bit Extension
Model Number: 48-28-4008
The Milwaukee 48-28-4008 is a 3/8 in. x 12 in. Selfeed Bit Extension — a 12 in. precision hex drive extension shaft that adds 12 in. of additional drilling reach when used with Milwaukee Selfeed bits, Ship Auger bits, and other Milwaukee boring bits that accept the standard hex drive extension interface. The 3/8 in. hex coupling specification of this extension is designed for use with smaller-format bits in the Milwaukee boring bit range where the 3/8 in. hex interface is the correct coupling size for the bit shank — providing the extension reach needed for drilling through double members and deep framing assemblies without requiring the operator to reposition the drill or switch to a longer bit. Combining the 12 in. extension with a standard bit enables reaching the full depth of multi-layer structural assemblies from a single drill setup, eliminating the time and effort of repositioning the drill or accessing the opposite face of the assembly.
The extension uses a hex drive coupling that transfers the drill's rotational torque and the bit's self-feed advance force through the 12 in. extension shaft to the working bit without slippage or wobble — maintaining accurate hole alignment through the extended reach that is dependent on the coupling's precision and rigidity. The 3/8 in. hex format's dimensions are matched to the Milwaukee smaller-diameter bit range and extension system for direct engagement without additional adapters. Extensions can be linked — two 12 in. extensions provide 24 in. of additional reach for the deepest applications in heavy timber and multi-floor structural assemblies where a single extension is insufficient for the required hole depth.
See Milwaukee's complete selfeed bit extension lineup for all available lengths and hex coupling formats matching the full Milwaukee boring bit range.
Features
- 12 in. additional drilling reach for multi-member and deep framing assemblies
- 3/8 in. hex coupling for smaller-format Milwaukee boring bit range
- Precision coupling maintains accurate hole alignment through extended reach
- Extensions linkable — two provide 24 in. for deepest heavy timber applications
- For Milwaukee Selfeed, Ship Auger, and compatible boring bits
Specifications
- Extension Length: 12 in.
- Coupling: 3/8 in. Hex Drive
- Compatible Bits: Milwaukee Selfeed, Ship Auger, and Flat Boring Bits (3/8 in. hex shank)
Includes
- (1) Milwaukee 48-28-4008 3/8 in. x 12 in. Selfeed Bit Extension
