Labor Saving Devices

Drilling Tools

Labor Saving Devices
EXT™ Series Flexible Extensions - for Drill Bits

Our EXT series of drill bit extensions are designed for a variety of unique drilling situations. They are designed to handle high torque loads, yet still allow needed flexibility for better control. These extensions are designed to handle the most common shank sizes of flexible drill bits used in wire installation: 3/16", 1/4" and 5/16". The EXT series enables the installer to drill through top and bottom plates and multiple fire blocks from the same entry point, making a two story (or beyond) retrofit installation quick and easy.

Simply determine the length of extension needed for the operation, determine the shank size of the drill bit (the end that chucks into your drill), tighten the set screws to secure the bit to the extension, and you’re ready to go. (Note: As with any long bit drilling situation, where the bit can be unwieldy, we also recommend our AT-7 drill bit directional tool for stability and control. See page 25).

Our EXT extension series comes in several lengths and configurations to customize your unique drilling situations. A hex wrench for the set screws is included.

(Not Designed for Hex bits - Round Shank Only)

Features Include:

  • Fits most standard shaft sizes.
  • Great for multi-floor drilling.
  • Most sizes are flexible.
Where To Buy
3/16" Shaft Extensions Model Name Part No:

2ft. Extension for 3/16" Shaft Drill Bits

EXT512 61-512

2ft. Extension for 1/4" Shaft Drill Bits

EXT522 61-522

2ft. Extension for 5/16" Shaft Drill Bits

EXT532 61-532

4ft. Extension for 3/16" Shaft Drill Bits

EXT514 61-514

4ft. Extension for 1/4" Shaft Drill Bits

EXT524 61-524

4ft. Extension for 5/16" Shaft Drill Bits

EXT534 61-534

6ft. Extension for 3/16" Shaft Drill Bits

EXT516 61-516

6ft. Extension for 1/4" Shaft Drill Bits

EXT526 61-526

6ft. Extension for 5/16" Shaft Drill Bits

EXT536 61-536
1/4" Shaft Extensions Model Name Part No:

2ft. Extension for 3/16" Shaft Drill Bits

EXT616 61-616

2ft. Extension for 1/4" Shaft Drill Bits

EXT626 61-626

2ft. Extension for 5/16" Shaft Drill Bits

EXT636 61-636

4ft. Extension for 3/16" Shaft Drill Bits

EXT716 61-716

4ft. Extension for 1/4" Shaft Drill Bits

EXT726 61-726

4ft. Extension for 5/16" Shaft Drill Bits

EXT736 61-736

6ft. Extension for 3/16" Shaft Drill Bits

EXT816 61-816

6ft. Extension for 1/4" Shaft Drill Bits

EXT826 61-826

6ft. Extension for 5/16" Shaft Drill Bits

EXT836 61-836