The OEMTOOLS 36-pc Magnetic Hex Bit Holder - 4 Pack, No. 24142, features an industrial-strength, ferrous magnetic base that adheres to most metal surfaces. Each tray holds 36 1/4" hex bits and includes space for a 1-1/4" hex bit adapter to complete jobs quickly. The trays are made from coated high-grade polypropylene material for durability and longevity. Each unit measures 7" long, 1-1/8 " wide, and 7/8" deep. Bits and bit adapter not included. Also sold individually.