Features: Strong magnetic, it can easily suck the screws when you use it. It can be used for handheld electric screwdriver, screwdriver, drill, air and other tools. Exquisite workmanship, each edge can be accurately locked screws, no damage to screws and screwdriver bits. Magnetic Hexagonal Ball Head 100mm ScrewdriverHigh quality S2 steel, this batch of head using high quality S2 steel, the surface of the batch head for the color of steel material, from the inside to the outside are the same. A good material does not need to do surface decoration through exterior decoration, batch quality is to look at the inner material. Specifications:Material: S2 alloy steel Size: 2.5mm, 3mm, 4mm, 5mm, 6mm Length: 100mm Head Type: Ball Shaped Rod Diameter: 6.35mm/0.25 inch Hex Head1/4'' (6.35mm) Hex Holder Magnetic HolderQuantity: 5pcs/1 setNote:1. Transition: 1cm=10mm=0.39 inch2. Please allow 1-3mm error due to manual measurement. Pls make sure you don't mind before you bid.3. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Content:5 x Ball Screwdriver Set