Mechanic Screwdriver Specifications 94 pieces The mechanic screwdrivers are engineering tools designed to withstand high torque and heavy pressure during equipment and vehicle maintenance. Basic specifications include: Material: Must be made of chrome-vanadium steel (Cr-V) or heat-treated alloy steel to resist rust, breakage, and wear. Handle: Ergonomically designed and made of non-slip rubber to ensure a firm grip when covered with oil and grease. Head (Tip): Features superior hardness, preferably magnetic to hold screws. Basic Types: Includes Phillips, Flathead (Slotted), Hex (Allen), and Torx (Star) screwdrivers. Comparing Screwdriver Types and Sizes The best types of screwdrivers come with universal standard specifications to ensure safe use: