USA 1/4 to 1-3/8 Cobalt M42 Step Drill Bit Set Spiral Flute
Drill Hog USA 1/4″ to 1-3/8″ Cobalt M42 Step Drill Bit Set Spiral Flute. Drill Hog is proud to release the newest technology in step drill bits. This new design features the exclusive spiral flute design.