The STEELMAN 41800 Precision Steel Shaft Screwdriver Set provides you with four different types of screwdrivers in various sizes to help with any repair job. The shafts are constructed of hardened carbon steel, ensuring the tips won't chip or round out with repeated use. Free-spinning, swivel caps allow for constant pressure during fastener installation and removal, and the knurled shafts prevent your fingers from slipping. To help remove stubborn hex drive fasteners and nuts the 6 hex and nut drivers have a hole in the shaft to which an included rod can be inserted to give you extra leverage and more torque. This 16-piece set includes 4 Phillips head drivers in size PH0-2, PH0, PH1-2, and PH1-1; 6 flat/slotted head drivers in size 1.0mm, 1.4mm, 2.0mm, 2.4mm, 3.0mm, and 3.8mm; 3 Hex head drivers in size 1.5mm, 2.0mm, and 2.5mm; and 3 nut drivers in size 3.0mm, 4.0mm, and 5.0mm. To keep all these tools organized they come in a convenient black and clear plastic storage case. The variety of tip sizes are ideal for working on eyeglasses, watches, electric guitars and other instruments, rc drones and vehicles, laptop and desktop computers, mobile phones, and other small electronics.