Features: Brand new and high quality Material: quality material to avoid broken during the usage. Each socket Adapters is constructed of heat-treated steel with a black coating.antirust, anticorrosion and excellent. Meet most industrial mechanical purposes. Work:The length is 4cm. Small appearance, lighter weight, conducive to daily operation and use of family, more convenient. General Usage: These adapters for use fitted with spring for firmerly locking socket . Consisting of most common bit size 1 or 4", 3 or 8" 1 or 2" changing size. It is a great tool for DIY handicraft home. Quality: More security.Provide for drill with work secure as well lock can hold the sleeve stably and standardly, avoiding easy slipping and affecting use. Quality Assurance: This product period of 30days from purchase. In the unlikely event that the product is nitially defective, we will return refund it. We will provide 24hours a day, 7day a week. If you have any other, please to contact Support and we will respond. Specifications: Material: Carbon steel Note: Please allow 0-1cm error due to manual measurement. please make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item. Package includes: 3Pcs Drill Socket Adapters