Irwin Speedbor Spade Bit Set, 8-Piece features a Blue-Groove point and cutting edge designed for faster chip removal, making your drilling tasks more efficient. The double cutting spurs precisely scribe the outside of the hole to reduce breakout, ensuring cleaner results. With a 10% larger shank for added durability and a grooved hex shank that prevents slipping in the drill chuck or bit extension, this set is built to last and perform reliably. The set comes in a Pro Set case made of molded ABS resin with a full-length metal hinge pin for secure storage and easy transport. Bit identification is simple thanks to easy-to-read size markings. Each bit has a 6" shank length and 1/4" shank size. This comprehensive set includes sizes 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", and 1-1/2", making it versatile for a wide range of applications. Model Number: 341008