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.

Features Include:

		Fits most standard shaft sizes.
		Great for multi-floor drilling.
		Most sizes are flexible.

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