The Bit Bar from Ernst is a premium organizer designed to hold a wide variety of hex bits in one convienent place. Taper lock holes provide a secure hold so tools won't fall out and it provides just the right resistance so tools can also be easily retrived. The rare earth magnets used in the base of the rail holds strong on metal surfaces, pulls through drawer liner, and even holds on vertical sides or upside down. The 30 Tool Bit Buddy holds long, medium, and short bits. Long bits lay flat and short bits are held upright. A specially designed hole can also fit a 3/8" drive chuck. Compact and convenient storage is great for in the toolbox, mounted on the side, or on the go. 18", 13", and 8" rail lengths are available in multiple configurations and integrate with the Ernst Boss Series. Ernst products are used and trusted by professional mechanics. Holds up to 30 bits. Patent US 10,449,665. Made in USA. Lifetime Guarantee.