FeaturesQUALITY: Made of premium material. These bolt-extractors are roller bearings that will not damage the thread on the-bolt.USE YOUR TOOLS : Fits 1/2 inch impact wrench or ratchet wrench (wrench not included). Turn your ratchet over to use as a bolt-fitter.Function : The 4 piece-bolt remover tool kit works effectively on threaded, broken, rusty, stripped and smooth-bolts for ultimates versatility. Contains smoothing internal paws that push into the fastenerWIDE APPLICATION: Bolt-remover socket set fits-bolts from 6mm to 12mm. Each socket has a permanently etched size for quick identification.PACKAGE INCLUDES: 4 Bolt-Removal Sockets - 6mm, 8mm, 10mm, 12mm and Carrying Case for your convenience; Wrenches required, not included.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementMaterial: AlloyPackage List:1/4pcs Bolt-Extractor