This comprehensive 35-piece screwdriver bit set includes a wide variety of bits for various tasks, including SL (Slotted), PH (Phillips), PZ (Pozidriv), T (Torx), and H (Hex) bits, with sizes ranging from SL3 to T40, covering a broad spectrum of needs. The set also includes 9 pieces of 1/4" X 20.5mm sockets, with sizes from 4mm to 12mm, ensuring versatility for different screw and bolt sizes. To enhance your precision, it comes with an adaptor, a 6.3X139mm bit holder, and a ratchet handle for ease of use. All items are neatly packed in a plastic box for easy storage and organization. This set is ideal for professionals and DIY enthusiasts alike, offering everything needed for a wide range of fastening and repair tasks.