The Eclipse Tools 31-in-1 Precision Electronic Screwdriver Set is a 31-piece screwdriver set. The handle features a smooth rotating cap to quickly screw and unscrew, without lifting the bits. The ergonomic design with a non-slip and dual color TPR handle provides operation comfort. There is a keyless chuck for easy adjustment of the extension bar. The adjustable bit holder design allows easy work inside tight or hard to reach places. This is a versatile set for driving and retrieving very small screws and comes in a storage box.