7pcs/set S2 Steel 75mm 1/4 Inch Hex Shank T 8-T30 Magnetic Security Star Screwdriver Bits Descriptions: These screwdriver bits are made of S2 material which is durable, anti-impact and tough. Magnetism enables them to fix on screwdrivers firmly.They are widely used in electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth. So practical item, make your life easier. Features: These screwdriver bits are magnetic head, so they can fixed on the screw firmly. Adopted of S2 alloy steel,which is anti-impact and tough, great wear resistant. With 1/4 in hex shaft, they are widely used on electric screwdrivers, hand screwdrivers, electric drills, etc. There are 7 different sizes/set .so is convenient to you, can meet your varied requirements.  Fit for electric screwdrivers, hand screwdrivers, electric drills, air drills and so forth. Specifications: Material: S2 alloy steel Handle size: 6.35 mm/1/4" The total length :75mm/2.95inch Head: security star head Specifications: T 8 T10 T15 T20 T25 T27 T30 Is it magnetic: yes Quantity: 7 PCS   Package Included: 1 x 75mm* T 8 Screwdriver bit 1 x 75mm*T10 Screwdriver bit 1 x 75mm*T15 Screwdriver bit 1 x 75mm*T20 Screwdriver bit 1 x 75mm*T25 Screwdriver bit 1 x 75mm*T27 Screwdriver bit 1 x 75mm*T30 Screwdriver bit