5/16" (Approx 8mm) - German Import - Style A - Challenge JO & JF / Lassco / Spinnit Drill Bit - 3.125" Overall Length - 2" Capacity - 1 ea. - CHA-312.350 / 2070 / CD-5 / DBA5-16

These premium hollow-spindle drill bits are designed specifically for your CHALLENGE JO & JF, LASSCO, or SPINNIT drills.  These bits are a consumable item, and should be either re-sharpened or replaced periodically.