Features: brand new and high quality 4 pieces screw extractors work with any drill and all the screw size or bolt. These extractor tools are used to reverse the damaged screw counterclockwise until it is released. Striped screw extractor removes even the most stubborn stripped, damaged, embedded, rusted and painted-over screws and bolts. Use a suitable size screw remover to drill a hole with cutting size and it's easy to extract the screw or bolt using extractor tool. Higher hardness material and is more durable than most screw extractors in market, the hardness and the durability are better. It is best to use electric hand drill, can not be used the hammer drill mode! Specifications: Material:HSS Length:5.2cm/2.05inches Color:Silver Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package includes: 4 Pieces Damaged Screw Extractors/Set