Yato professional roller stud extractor set 17 pcs Universal: removes damaged, broken or stuck screws with little effort. Even large screws (up to M18) are unscrewed safely and quickly â?? the uncomplicated alternative to drilling. Versatile: the generous box contents consist of 17 parts: attachments with 3/8 inch drive = 9, 10 11, 12, 13, 14, 16 and 19 mm Attachments with 1/2 inch drive: 6, 8, 10 and 12 mm Extractor: M3-M6, M6-M8, M8-M11, M11-M14, M14-M18 for all types of Phillips, T-profile and hexagon socket screws Designed to work with 1/2" and 3/8" ratchet or wrench/spanner Removed popular sizes studs: M6, M8, M10, M12 Sturdy and durable design Made with high quality chrome vanadium steel CrV 50BV30 and chrome molybdenum steel CrMo 42 Extractors are the concentric roller bearing type and will not damage the thread Supplied with case for storage Vat receipt with every order