Amazon.com: HSS M3 x 0.5mm Tap and M3 x 0.5mm Die Metric Thread Left Hand : Industrial & Scientific
12 PCS,1/4", HSS Black and Gold Coated Twist Drill Bits, Metal Drill, Ideal for Drilling on mild Steel, Copper, Aluminum, Zinc Alloy etc. Pack in Plastic Bag - - Amazon.com