The Milwaukee 48-89-2320 23/64 in. Thunderbolt Cobalt Twist Bit is a high-quality drill bit designed for hard metal machining. With a size of 23/64 inches and an overall length of 4.5 inches, this bit is ideal for woodworking and metalworking projects. The Thunderbolt Cobalt technology ensures superior performance and durability, making it a reliable tool for professionals and DIY enthusiasts alike. Made by the trusted brand Milwaukee, this drill bit is a great addition to any toolbox.