The GripEdge Tools 10-pc 3/8" Drive Metric Socket Extractor Set, No. XBM10S, includes sockets ranging in size from 10 mm to 19 mm. Each socket uses Rounding Prevention Technology designed to grip up to 100 percent rounded fasteners. The sockets are made from CrMo steel for increased strength and durability and coated for corrosion resistance. The set also includes laser-marked sizing details for every socket and a G-FORS pusher rod that removes extracted bolts or studs from a socket.