Great Material: The hex allen key drill bit set are made of premium S2 steel material, which is sturdy and durable, with high hardness and durability, and can be used for a long time. Screwdriver Bit Sets: There are 10 different sizes of impact hex driver screwdriver bits for you to choose from, including 8mm, 7mm, 6mm, 5mm, 4mm, 3.5mm, 3mm, 2.5mm, 2mm, and 1.5mm. Magnetic Design: Each impact allen wrench bits is equipped with a magnetic tip that can easy to hold the screws and tightly absorb the screws, stop them from falling off. Universal 1/4 Inch Hexagon Shank: Not only can you use allen wrench drill bit set on manual tools, but you can also easily insert them into any 1/4 inch hexagonal shank drill for use. Magnetic hex bits set length: 50 mm/2 inches. Wide Application: Using this hex head drill bit set can improve your work efficiency and save time. The magnetic impact driver bits set can be used for furniture installation, home appliances and more., Weight: 0.220462262 pounds, Manufacturer: TakFree