The Irwin Tools 1792761 17-Piece Speedbor Blue Groove Pro Set with Storage Case provides you with every size Standard Length Speedbor paddle bit made in a durable pouch for easy transport to your job site. The set contains a 1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4, 13/16, 7/8, 15/16, 1, 1-1/8, 1-1/4, 1-3/8, and 1-1/2-Inch bits. The Blue Groove Spade bits feature double cutting spurs that scribe the outside of the hole reducing breakout. The bits have a thicker cutting edge that gives the bit more durability and a longer cutting life. The patented Blue-Groove Point and Cutting Edge makes for faster chip removal, resulting in faster drilling. The Shanks of the Blue Grooves are also thicker than traditional spade bits for durability. The quick change shank fits all standard 1/4-Inch quick Change chucks, and the hex design also reduces slipping in traditional 3-point chucks. With the soft sided case, this set is easy to put in a tool box or bag and head out to work. The case helps keep your bits in order and reduces the chances of losing one of your bits.