Premium Steel Construction: The bits are made from steel, ensuring hardness, precise grip, and long lasting durability with excellent wear resistance 153 in 1 Comprehensive Bit Set: This versatile screwdriver bit set includes 153 different bits, covering various types, making it perfect for daily household repairs and multiple applications Flexible Shaft for Tight Spaces: Features a flexible rotating shaft that allows easy access to screws in narrow or hard to reach areas, solving tricky corner and angles problems Professional Applications: Ideal for repairing smartphones, precisions instruments, and various electronic devices, making it a must have for both home DIYers and professional technicians Compact Storage Case Included: Comes with a practical storage case for organized portability, keeping all bits neatly arranged and easily accessible whenever needed, Manufacturer: Kaeltsyn