The Irwin 3/8 8-Piece Woodboring Drill Bit Set (Model B2) is a high-quality collection of drill bits designed for precision and efficiency in woodworking projects. With a diameter ranging from 1/4" to 1 3/8", this set includes various sizes to accommodate different drill bit needs. The length of each bit is 4 inches, providing ample reach for deep drilling. Made by the trusted brand IRWIN, these drill bits are reliable and durable, making them a valuable addition to any workshop or tool collection.