Magnetizer / Demagnetizer Tool: Instantly magnetize or demagnetize screwdriver bits; perfect for picking and positioning screws in assembly, repair and maintenance. 12pc Socket Set and Ratchet Handle: The most commonly used 4 -13 mm 1/4 drive sockets for nuts and bolts; the thick grip ratchet handle with a 2-direction switch turns smoothly both sockets and bits.