Accuracy Model Repair set : This set includes 4 sturdy hexagonal screwdrivers (15mm, 20mm, 25mm, 30mm) specifically designed for model maintenance, ensuring accurate and efficient repairs for hobbyists and professional alike sturdy Metal Construction : Made from premium metal materials, these screwdrivers excellent durability and resistance to deformation, making it ideal for long term use in accuracy model assembly and repair Ergonomic Comfortable Grip : Featuring a humanized handle design, the tools provide a comfortable and nonslip grip, reducing hand fatigue during extended use and enhancing operational accuracy Compact & Portable Storage : The included storage case keeps all 4 screwdrivers organized and protected, making it easy to carry for outdoor event, competitions, or on the go repairs Versatile Tool Set : Perfect for repairing various models, drones, and other hobby , this comprehensive set meets the needs of both enthusiasts and professional technicians with its multi size compatibility