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Long Length Hollow Drill Bits up to 2-1/2" Capacity
3-11/16" Overall length (Note: Length may vary slightly due to sharpening).
Used only on EH-3A, EH-3C, MS-5, MS-10A.
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Standard Length Hollow Drill Bits up to 2" Capacity
3-3/16" overall length (Note: Length may vary slightly due to sharpening). This length will work in all Challenge drill models. more info