This nut tool is 1/4" magnetic that fits most corded or cordless drills, with a strong internal hex socket. It is widely used in tool supplies. DIY, auto parts, woodworking, professional machinery, etc. The product is easy to install and disassemble, and does not come off easily when using. Anti-rust, non-slip, high occlusion, waterproof and flexible. Widely used in hex tools such as air spinner, electric spinner, air drill, electric drill, electric drill, gun drill, hand screwdriver, etc.< /p> The set includes: 9 Power Nut Driver bits (metric): 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm. Note: The data is manual measurement, please allow some 1-157cm error, due to differences between light and screen, there will be a certain color difference, the specific received in kind prevail.