A professional tire screw extractor kit is widely used for household repair, auto parts and machine repairing. Features: Made of chromium-molybdenum steel with great durability for long-time use. Strong inner hexagon sleeve without magnetic. Fit with most powered corded or cordless drills to drive hex head screws. The specifications of the bits inlcude 17mm, 19mm, 21mm, 22mm. Suitable for household DIY, woodworking, auto parts, professional machine repairing, etc. Removes loosening locked lug nuts and damaged lug nuts. Specifications: Material: Chromium-molybdenum steel Box Color: Red, Blue (optional) Package Weight: 818g / 28.85ounces Package Size: 165 * 122 * 50mm / 6.5 * 4.8 * 1.97in Packing List: 1 * 17MM Twist Socket 1 * 19MM (3/4") Twist Socket 1 * 21MM Twist Socket 1 * 22MM Twist Socket 1 * 12MM Straight Rod 1 * Storage Box