This 3-Piece tool set includes the Tradesman Po Organizer Tool Backpack (Cat. No. 55421BP-14), the Heavy-Duty Multi-Bit Screwdriver / Nut Driver (Cat. No. 32557), and the ) 600V Auto-Ranging Digital Multimeter (Cat. No. MM400. The Tool Backpack features 39 pockets for plenty of tool storage, including a hard, molded front pocket for safety glasses and a front zipper pocket to store loose parts. The Multi-bit Screwdriver features an interchangeable shaft that holds 6 universal tips; converts to 3 nut driver sizes and 1 hex driver. The Auto-ranging Multimeter measures AC/DC voltage, AC/DC current, and resistance. It can also measure temperature, capacitance, frequency, duty-cycle, and test diodes and continuity.