#74 Solid Carbide Drill Bit - USA Made Drill Bits of solid micro grain carbide. These industrial quality Solid Carbide Drill Bits are for sale by Bisco of Florida. Solid Carbide Drill Bits are excellent for drilling cast iron, non-ferrous metals, high silicon aluminum, copper, plastics, bronze, hard rubber, plexiglass and similar non-ferrous alloys. #74 Solid Carbide drill bits are manufactured for drilling abrasive materials and Solid Carbide drills are used in high temperature drilling applications. Call the knowledgeable sales staff at Bisco Tool Supply toll free 1-866-247-2635 with questions about drill bits and solid carbide drill bits.