1/2in Drive Socket Stud Screw Extractor Tool 6 8 10 12mm Sleeve Remover Installer Kit1. Feature: These stud extractors are integrated concentric roller bearing type that is easy to operate, and won't damage the thread on the stud.2. Important Parameter: The socket stud screw remover set has a 1/2in drive, and four 6, 8, 10, 12mm sleeve, with hexagon screw stud design.3. Material: The socket stud screw extractor tool set is made of high strength chrome tangsten steel material, which has high toughness, impact resistant and durable.4. Fine Workmanship: Professional manufactured, exquisite workmanship with unique design, ensure stable performance and high reliability.5. Application: Manufactured with high precision, thickened material can perfectly fit with 21mm spanners (not included) with the hex drives on the top of the socket.Specification:Item Type:SocketStudScrewExtractorToolMaterial:Chrome tangsten steelDrive Size: 1/2inSleeve Size: Approx. 6mm/0.24in, 8mm/0.31in, 10mm/0.39in, 12mm/0.47inPackage List:4 x Screw Extractor Tool1 x Box