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Item 1 of 5

The steel blade is smooth and shiny with pointed edges at its extreme tip. The blades of Phillips screwdrivers taper to a cross, but other styles of screwdriver have slotted tips (figure 2). These tips can have parallel sides or cabinet-style shapes that taper slightly. The dimensions of the blade and its tip vary depending on the size of the screwdriver. Typical lengths for the blade range from 40 to 200 mm. Slotted tip widths range from 2 to 12 mm and tip thicknesses from 0.4 to 1.6 mm. The blade shaft can be chrome or nickel plated to protect it from corrosion, and tips are often hardened and coated in black oxide.