snippet: <p>Screw flats in line. Maximum drilling depth 3". For core bits made by: </p> <strong>Fits: </strong> JCM 312 U Magnetic Base Drills up to 2 9/16 in (65 mm) 3 1/8 in (80 mm),JCM 312 auto Fully Automatic Magnetic Base Drills up to 2" / 3-1/8" in (50/80 mm)

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