Features: Strong magnetic, it can easily suck 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 and screwdriver bits High quality S2 steel, this batch 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. Good material does not need to do surface decoration through exterior decoration, batch quality is to look at the inner material Use 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! Specifications Material: S2 alloy steel Head type: Cross Shank type: 6.35mm /1/4 inch hex head Length: 100mm Size: 100mmxPhi; 3.0xPH1 100mmxPhi; 4.0xPH1 100mmxPhi; 4.0xPH2 100mmxPhi; 4.5xPH1 100mmxPhi; 4.5xPH2 100mmxPhi; 5.0xPH1 100mmxPhi; 5.0xPH2 100mmxPhi; 6.0xPH1 100mmxPhi; 6.0xPH2 Quantity: 1 Set (9pcs) Note: Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Compare the detail sizes with yours, please allow 1-4CM differs due to manual measurement, thanks! Package Included: 1 Set x Phillips Screwdriver