The C series of drill bits from Capital Advanced Technologies is designed for drilling FR-4 circuit board materials. The drill element is fabricated of solid carbide since carbide is the preferred material for drilling glass epoxy circuit board laminates due to its exceptional hardness. These carbide bits are capable of several hundred or even thousands of hits before significant degradation of sharpness. The number of holes that can be drilled is dependent on a number of factors including feed rate, speed, material characteristics, and what the user considers acceptable hole quality. Due to the brittleness of carbide these drill bits are recommended for use with drill presses or precision equipment. Care must be taken not to drop or flex them as breakage may occur. Customers can use these bits to make their own printed circuits or to modify SURFBOARDS, surface mount breadboards, or other types of boards.