Features: Professional Screwdriver Set with alloy steel bits delivers exceptionally durability and 60HRC hardness for long lastingly performances in demanding repair tasks. Ensures seamless compatibility with electric drills and manual tools, featuring quick changes design to reduce operations time by 40% in multi device maintenance. Ideal for home DIYer enthusiasts, professional technicians, and automotive repair specialists requiring versatile, industrial grade tools for precise work. Tackle complex assemblies in workshops, garage machinery repairs, or outdoor equipment maintenance with the compact case ensuring portability across job sites. Nonslip textured surfaces and corrosions resistant coating maintain secure grip during high torques applications, even in humid environments, while organized storage prevents bit loss. Specifications: Component: alloy steel Storage box Size: Approx.15x10x5cm Color: Black/Silver Batch head hardness:60HRC Standard interfaces for adaptive drill Use scenarios: Home maintenance | Automobile maintenance | Electronic product assembly and other multi-mode switching Package Includes: 54pcs/28pcs/50pcs Multiple Shape Screwdriver note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.