- Extends reach for tight spaces
- Accepts most shanks
- Fast and efficient for productivity
- See More Details
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Product Overview
The Milwaukee 48-28-4008 3/8 in. x 12 in. High-Speed Steel Keyed Extension Bit fits 3-jawed chucks. This bit is designed to extend your reach by 12 in. when drilling with Milwaukee hole-saw arbors. For 3/8 in. hex shank hole saw arbors. The bit is 12 in. in length.
- Designed for 3/8 in. hex-shank hole-saw arbors
- 3/8 in. hex shank fits 3-jawed chucks
- Extends your reach by 12 in. when drilling with Milwaukee hole-saw arbors
- High-speed steel construction
- Shop All Milwaukee Tools
Info & Guides
Specifications
Dimensions
Drive Size (in.)
3/8
Product Depth (in.)
2.0 in
Product Height (in.)
1.5 in
Product Length (in.)
2 in
Product Width (in.)
18.00
Shank Diameter
3/8 in
Shank Diameter
3/8 in
Details
Drill Bit Type
Bit Extender/ Holder
Drill Bit Type(s) Included
Bit Extender/ Holder
Individual/Set
Individual
Magnetic
No
Number of Pieces
1
Returnable
90-Day
Shank Style
Hex
Shank Style
Hex
Tools Product Type
Power Tool
Questions & Answers
11Questions25Answers
Where can I find a replacement allan set screw for this thing? I brought one not too long ago, bu...
Asked by Jose January 18, 20210
AnswersWill this work for a drill bit with a round shank?
Asked by Me April 25, 20202
AnswersNo. Not for a 3/8 diameter without enlarging the socket. It will work for a 23/64 diameter without modifications.
What is the size of the hex/set screw for the bit extension?
Asked by steveo April 20, 20201
AnswerHello Steveo, 3/8 in. hex shank fits 3-jawed chucks. This will extend your reach by 12 in. when drilling with Milwaukee hole-saw arbors.
will work with the Lenox hole saw arbor?
Asked by Javier November 25, 20193
Answersyes
how do you open the packaging on the 3/8 extension?
Asked by DG October 5, 20185
AnswersTake a pair of pliers from the FRONT on the bottom retainer (the tabs will be on the opposite side)of each side and bend up (or down). The tabs will slide through the holes.
Can you connect two or three of these together to get a longer reach?
Asked by allegiance January 5, 20185
AnswersYes, you can. I have used more than that connected together. I recommend periodically checking the set screws to ensure they remain tightened as on a couple of rare occasions they became loose over time. Overall, this product worked well for me.
Would the shaft fit the Arbor bit (not sure the thickness....) that comes with the "Bosch 7 Piece...
Asked by wg865 March 31, 20172
AnswersThis is advertised as a 3/8" extension. This hex extension does fit a 3/8" chuck. The receiver end is too small to accommodate conventional 7/16" hex hole saw arbors nor self-feed bits.
Would this work with a 4" round diamond core bit for going through masonry?
Asked by spacecollector May 19, 20162
AnswersYes
What is the width of the widest part of the shaft?
Asked by David510 April 19, 20161
AnswerThe widest part of this extension's shaft is about 1/2"
Does this bit extender feature dual set screws oriented 180 degrees apart?
Asked by BadMon August 25, 20154
AnswersNo 1 set screw
Customer Reviews
Jul 22, 2015
Well mad tool
This is one of those tools you may not need often, but when you do you really need it. This is the larger 3/8” size, and you will only want to use a 3/8” chuck bit in it. The ¼” bits are the wimpy ones which fit in the quick change chucks. This is well built like all Milwaukee tools, heavy to the point that it just dares you to break it. I like the recessed set screw so it does not damage the wood during a drill. Well made tool that you will pass down to your grandchildren someday.
by achersaway
Apr 12, 2021
This extension uses set screws to attach to the drill,...
This extension uses set screws to attach to the drill, but do so very securely and with no wobble. Works excellent not only with Milwaukee hole saws but also Diablo Quick Lock, which is also the same system for the Bosch diamond hole saws which I use all of the above. Good solid tool, as one would expect from Milwaukee's excellent line of bits and blades.
by Fango
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