The locking structure of the multi-bit magnetic screwdriver set is extremely stable, providing excellent performance and a long service life. Includes different types of screwdrivers to meet the needs of professional, family, work, and maintenance use. 20-piece industrial steel screwdriver bit, continuous heat treatment. CARBONIAZE REFINING, FOR INDUSTRIAL SERVICE. Screwdriver set with powerful handle. The magnetic feature adheres small head screws to the tool, suitable for delicate electronics disassembly. Crost to Multifunctional magnetic ratchet Screwdriver set with ergonomic handle provides comfort and a secure grip