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Shipping weight for this item is 7 ounces
The Chucking Extension is nine inches in length, excluding the chucking area, for those deep hard-to-reach spots. Using it with TightFit® threaded shank drill bits provides the utility of an expensive set of "deep reach" extension drill bits. It is made of mild carbon steel (1144) and has a body diameter of 3/8" with 1/4-28 UNF-2B internal threads, a shank diameter of 1/4", shank length of 1-1/4" and is black oxided to prevent corrosion while enhancing appearance.
Note: For use with TightFit® threaded shank drill bits or other threaded items.