12-in-1 Quick-Release Step Drill Bit, Spiral Flute, produces 2-3 cm Holes and intermediates. 10x more Durable

12-in-1 Quick-Release Step Drill Bit, Spiral Flute, produces 2-3 cm Holes and intermediates. 10x more Durable

Step Drill Bit, Quick-Release. 2-3 cm Holes and Intermediate. QRST11 Features Step drill bits have an aluminum titanium nitride coating, 10 times more durable than vaporized black oxide coating to...