Product Description\n--Standard size: 18 pieces 90mm CrV Long screwdriver bits, nickel plated, with color rings: PH1/2/2/3, PZ1/2/2/3, T10/15/20/25/27/30/40, H 3/4/5, 1/4 hexagonal shank, quick change, perfect for most manual screwdrivers, electric screwdrivers, electric drills, air drills, etc.\n--Industrial Grade Quality: The security screwdriver bit set is made of CRV steel material, with matte anti-rust treatment on the surface, with color ring for user identification and magnetic tip. The magnetic holder is suitable for all manual and electric screwdrivers, stored in a durable plastic box.\n--Super Strong Magnetic: This extra long 90mm screwdriver bit has a strong magnetic tip, which can easily absorb screws, thus improving work efficiency. Easy to install and remove security screws, especially in small spaces.\n--High Quality Material: Made of heat-treated chrome vanadium steel, high hardness, nickel-plated surface for corrosion resistance, long service life, can increase drill.