Bosch Gold Oxide Drill Bits offer added speed and durability for general-purpose drilling applications in wood, plastic and light-gauge metal. Each of the bits in the set can be used in a standard three-jaw drill - both corded and cordless. The gold oxide coating helps to provide longer accessory life than high-speed steel drill bits. It provides resists heat buildup, provides durability and offers effective material removal. The bits that are 1/8 In. and larger have a 135 degrees split point to reduce bit walking. The tips help eliminate the need for a center punch in light gauge metal. Bits smaller than 1/8 In. have 118 degrees standard point. The set comes with a metal case for convenient storage.