3/8 SHANK, 4" FORSTNER BIT EXTENSION3/8 SHANK, 4" FORSTNER BIT EXTENSION 42936, 3/8" I.D. CAPACITY Irwin Forstner Bits all have reduced 3/8" shanks so they fit into 3/8" portable drills and machines that feature a 3/8" drill chuck. They also feature a brad point tip that helps start the bit cleanly, especially on uneven surfaces. A 4" extention with a 3/8" shank is also available, part number is 42936.
Metalworking & Cutting Tools Drill Bits Forstners Bit - IRWIN-FB4 - 3/8 Shank, 4" FORSTNER BIT EXTENSION
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