The Impact Gold 14 pc. Titanium drill bit set (B-65399) offers an assortment of ¼” hex shank bits for drilling clean and accurate holes in metal, wood and plastic. With the titanium nitride (tin) coating, these bits are engineered to last 2.5x longer than non-coated bits. The 135-degree split-point geometry is built for fast starts and reduced “walking”. The bits are impact-rated and for use in ¼” hex impact drivers (sold separately). They are ideal for drilling holes in ferrous metal, wood, plastic, non-ferrous metal, cast iron and stainless steel.