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 screwdriver screws and bitsHigh quality S2 steel, this batch of head using high quality S2 steel, the surface of the charge 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, the quality of the batch is to look at the inner materialUse different sizes to screw in, it will damage the screwdriver and screw! With the right screwdriver, pay less effort, and you can easily loosen the screws! SpecificationsMaterial: S2 alloy steelHead type: Cross Shank type: 6.35mm /1/4 inch hex headLength: 100mmSize:100mmxPhi; 3.0xPH1100mmxPhi; 4.0xPH1100mmxPhi; 4.0xPH2100mmxPhi; 4.5xPH1100mmxPhi; 4.5xPH2100mmxPhi; 5.0xPH1100mmxPhi; 5.0xPH2100mmxPhi; 6.0xPH1100mmxPhi; 6.0xPH2Quantity: 1 Set (9pcs)Note: Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Compare the detail sizes with yours, please allow 1-4CM differs due to manual measurement, thanks! Package Included:1 Set x Phillips Screwdriver