This set is perfect for your impacts driver or drill, and allows you to replace your ratchets with a power tool Used for installation on tools such as electric hammer drills, impacts drills, rechargeable drills Make of high strength alloy, wear-resistant, impacts resistant, ensuring long term use The product has a high degree of bites and can effectively reduce the degree of screw damage Drive Bit Power Drill Socket Driver Extension Adapters 1 / 4inch, 3 / 8inch, 1 / 2inch, Manufacturer: Kaeltsyn