Multi bit screwdriver set locking structure of arm is extremely stable, providing excellent and long service life Includes different kind of screwdriver bit to meet the needs of professional use, home life, work, maintenance Screwdriver set with handle powerful feature adheres small screws to the tool head, suitable for delicate electronics disassembly 20pcs industrial steel screwdriver bit, continuous heat Carbonization heat refining, industrial service life, hard but not break, full of toughness Multifunctional Ratchets wrench and screwdriver set with ergonomic handle provide comfort and secure grip, Manufacturer: BULAIDAI