Product Material: S2 alloy steel Head shape: U Handle: hexagonal shank Handle size: 6.35mm / 1/4 Length: 50mm Specification: U4, U5, U6, U7, U8 Is it magnetic: yes Quantity: 5 PCS 1. [HIGH QUALITY]: These U-shaped screwdriver bits are made of high quality S2 alloy steel material, which is commonly used of high material hardness, makes these screwdriver bits sturdy and durable. 2. [MAGNETIC HEAD]: The magnetic bit head is convenient to use and does not slip, more convenient. 3. [5 SIZES]: This screwdriver bit set included 5 different U-shaped size, can meet your different needs. 4. [CLEARLY MARKED]: Printed area with specifications, easy to find screwdriver bit in your toolbox. 5. [WIDE APPLICATION]: It is useful to use electronic device, perfect for electrician, mechanical repair work.