21 Piece Heavy Duty Bit Kit (MUST BE ORDERED IN MULTIPLES OF 5 ONLY) Engineered and tested to meet the highest standards, these premium grade s2 tool steel screw driver bits are designed for long life and heavy duty use. The heavy duty storage case is a bonus, allowing added organization to those common bits that always seem to get lost. Double ended driver bits are adaptable for most jobs regardless of trade. Features: 21 Pieces For #12 to #14 Screws Must be ordered in increments of 5 (5,10,15,20 etc) Since its founding in 1924, Milwaukee has focused on a single vision: To produce the best heavy-duty electric power tools and accessories available to the professional user. Today, the Milwaukee name stands for the highest quality, durable and reliable professional tools money can buy.