The 35-piece drill and screwdriver set is a good choice for general use. It includes accessories for important drilling and screwing applications. The screwdriver bits are made of modified S2 steel, with optimized heat treatment for greater hardness and high performance. They also have a torsion zone that easily handles torque spikes, absorbing force and vibrations. All screwdriver bits have color coding for quick identification. The set also includes CYL-3 drills for long-lasting performance in rough materials such as concrete and stone. 

The screwdriver bits have an external, hexagonal shank of 1/4 inch for screwdrivers and impact drills. The drills have a cylindrical shank for all electric or portable impact drills. It has an external, hexagonal shank of 1/4 inch and is suitable for general use with screwdrivers and impact drills.