Features: 20pcs industrial steel screwdriver bit, continuous heat treatments. Auxiliary high-precision control integrated molding, carbonization heat refining, industrial service life, hard but not broken, full of toughness. Includes different kind of screwdriver bit to meet the needs of professional use, home life, work, maintenance. Multi bit magnetic screwdriver set locking structure of arm is extremely stable, providing excellent performances and long service life. Screwdriver set with handle powerful magnetic feature adheres small screws to the tool head, suitable for delicate electronics disassembly. Multifunctional magnetic ratchet wrench and screwdriver set with ergonomic handle provide comfort and secure grip Specifications: Component:Steel Size:Approx.12.4x7.2x2.8cm/4.88x2.83x1.10inch Package Includes: 1 Set Magnetic Screwdriver note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.