This Neiko mini ratchet driver includes 7 of the most commonly used bits. It is great for getting into hard to reach areas that a normal screwdriver can't go. At a compact 4" length and 1" depth, this set can be used in even the tightest of spaces. We keep one of these sets with all our road bikes & mountain bikes, motorcycle bag, in our glove box, tool box, office desk, kitchen drawer, basically everywhere. They can be used to assemble furniture, install stereos, door knobs, sewing machines, quick bike adjustments, tight car spaces, rvs, boats, and so much more.