Each driver comes with 12 double-ended bits that are stored securely within the screwdriver's handle. This precision screwdriver is designed specifically for those working with (and on) electronics, technology, security, jewelry, and any other repairs in a “micro” environment. The patented palm-saver cap not only saves your palm from blisters, but the smooth ball bearing inside allows for a fluid rotation of the end cap allowing you to seamlessly tighten and loosen screws with a single hand. The raised rubber grips on the collar provide even further control and comfort, maximizing speed and efficiency on any project you tackle!