3/16" (Approx 4.75mm) - German Import - Style A - Challenge JO & JF / Lassco / Spinnit Drill Bit - 3.125" Overall Length - 1.7" Capacity - 1 ea. - 2030 / CD-3 / DBA3-16

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.