The IRWIN Speedbor 12pc Steel Spade Drill Bit Set is a versatile and durable tool set designed for cutting tasks. With a 1/4 inch shank, these spade bits are suitable for use with a drill and are made of high-quality steel. The set includes 12 pieces with diameters ranging from 1/4 inch to 1 3/8 inches, making it suitable for a variety of applications. The silver and blue color scheme adds visibility to the bits while working. Ideal for both professionals and DIY enthusiasts, this set from IRWIN is a reliable choice for any workshop or job site.