1. bits made of CR.V steel 2. precision heat treatment 3. plastic box and clamshell carded pack precision screwdriver & bits setPHILIPS: PH000, PH00, PH0, PH1TORX: T5, T6, T7, T8, T9SLOTED: 1.5, 2.0, 2.5, 3.0, 4.0mm1PC BIT SCREWDRIVER1PC EXTENSION BAR 16PC PRECISION SCREWDRIVER BIT SET