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° 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° standard point. The set comes with a metal case for convenient storage.