Cheap And Discounts HSS Step Drill Bit Driver Bit Drill Cone Hole Cutter Taper Metric 4 - 12 / 20 / 32mm 1 / 4 "Titanium Coated Metal Hex Core Bits Wholesale. Buy Directly From Merchant Mintiml Homeware Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.