Size: Connecting Hex Shank (6.35mm) Features: Total Size: 60 x 10mm. Diameter: Bit Type: 6.35mm Widely Used: Suitable for universal 6.35mm hex shank drill bits, suitable for drill, screwdriver, batch head and others to transfer, extend all kinds of screwdriver bits Carbon Steel: This rod is made of high quality carbon steel and plastic, which makes it practical and durable, ensuring a long service life and maximum durability. Strong Bit Magnetization: The magnetic bits hold the bits securely, the magnet is located inside the chrome tube, convenient for picking up and holding screws.