Description: Material: This Ratchet Screwdriver set is made of steel material, which is durable, not easy to deform, and has a long service life.8 in 1 Multi Function: Our Ratcheting Screwdriver has a two way adjustment device with a bit holder, forward and backward adjustment, and contains 4 double ended bits,Wide Application: This Bidirectional Ratchet Screwdriver Set is widely used in a variety of occasions and can accept 1/4" hexagonal shank drill bit, such as machines, cars, and other small spaces.Portable Storage: The portable Multipurpose Tool Kit adopts a hidden bit storage, storage lock design, compact design, specially designed for small spaces, easy to use, convenient and fast, and easy to carry.Practical Design: The multifunctional Screw Driver Tool adopts a 36 ratchet structure, which is easy to disassemble, lightweight and portable, making it a gift for professional miscellaneous workers. Specification: Note: The drill bit hardness is HRC51-55There are 4 types of drill bit: (T30-6.0), (H5+3.0), (+PH2), (T20-3.0) Size Chart: 13cmx14.5cm/5.12inchx5.71inch Package Includes: 1 Bidirectional Ratchet Screwdriver Set Note: Please allow slightly errors due to manual measurement and different monitors.