HIGH QUALITY S2 STEEL: Slotted Phillips driver bit set is made of excellent industrial grade S2 steel material for superior hardness, phosphating black treatment for good anti-rust, which is stronger and more durable than others, don't worry it will be rust or corrosion in the rain

MOST POPULAR SIZES: Slotted Phillips screwdriver bit set comes with 12 sizes which for Slotted: SL3, SL4, SL5, SL6, Phillips: PH1*3.0, PH1*4.0, PH1*4.5, PH2*4.0, PH2*4.5, PH2*5.0, PH2*6.0, PH3*6.35. Each size was laser measured for a perfect size measurement! 100mm/4'' length, can deep enough for difficult operations, meet daily needs

STRONG MAGNETIC: Magnetic long slotted phillips driver bit set, can be easily keep screws stuck to them, to prevent the screw from falling off. Bring a professional, fast and convenient drilling efficiency, greatly saving your time of hand screwing, improving your work efficiency

WIDELY APPLICATION: Used in automobiles, repairs, trucks, automobiles, engines, motorcycles, interiors, dashboards, computers, cable boxes, toys, appliances and consumer electronics, drill bits can also be used in many other protected parts.

GENERAL TOOLS: This 1/4" hex shank screwdriver bit set can be used with electric screwdrivers, hand screwdrivers, electric drills, combination general purpose tools and any standard drill