Recommended for simple, low cost removal of broken screws and bolts, these 4 and 6 piece sets from Kennedy are the ideal way to extract screws. designed to remove broken screws without damaging the threads of the component, each set has varying sizes to ensure you find the right size based on your needs. Features and Benefits Available as a 4 or 6 piece set to sllow you to select the product most relevant to your needs An economic, easy way to replace broken screws without damaging the component Packaging has easy read labeling to inform you of the recommended drill size to fit the extractor best Contents 4 Piece Set Sizes: No. 2, 3, 4 and 5 6 Piece Set Sizes: No. 1, 2, 3, 4, 5 and 6 Typical Applications Ideal for removing broken or damaged screws from materials without damaging the thread