The Milwaukee 48-89-2328 31/63 in. Thunderbolt Cobalt Twist Bit is a high-quality drill bit designed for woodworking and metalworking projects. This specific model is new and sealed, ensuring its freshness and reliability for your drilling needs. With a drill bit size of 31/64 inches, it offers precision and durability for various applications. As part of the Milwaukee brand, known for its reliability and performance, this twist bit is a trusted tool for professionals and DIY enthusiasts alike.