Comprehensive set with adjustable lengths of 80 mm, 120 mm and 140 mm to tackle diverse drilling tasks efficiently. Reliable locking system with magnetic support keeps bits securely in place throughout use, improving safety and reducing the need to stop to reseat bits. Userfriendly design features an outer sleeve separated from the bit shaft, providing a solid grip while allowing smooth rotation of the screwdriver head for precise positioning. Effective guide sleeve with selfretracting action covers long screws, facilitating accurate screw driving, minimizing wobble, and protecting fingers from injury. Use scenarios Furniture assembly or cabinetry work where different screw lengths are required, enabling quick adjustments without changing tools. Installing shelves, brackets, or fixtures that use long screws, ensuring stable placement with reduced wobble. Overhead or tightspace projects where secure bit retention and guided screw driving improve accuracy and safety.