For all minor repairs in the home, PC, notebook, tablet, and electronics sector. Indispensable for precision mechanical work on electronic devices. The inserts (bits) are made of high-quality and robust steel. Handy and elegant case in leather look. Fits in every trouser pocket and drawer. The set consists of: 1 sturdy aluminum handle with a non-slip, ribbed surface, 9 interchangeable torque bits, 4 interchangeable hexagon socket bits, 3 interchangeable cross recess bits, 3 interchangeable slot inserts, 3 interchangeable pentalobe inserts, and 2 interchangeable tri-wing inserts.