High Quality Material: Made of forged chrome vanadium steel with high hardness, these bolt extractors are sturdy and durable. Compatibility: These Extractor tools can be driven with a metric spanner or socket for fast work. The short and stocky design provides a firm grip without drilling a deep hole. Bolt Removal Set: This is a set of 10 pieces nut set that can be used with a combination wrench adjustable for removing damaged, stripped, rusted, or painted fasteners (screws/nuts/bolts) of all types of the wrenches, pliers, vise grips, or socket. Application: These Locking Socket Tools fit hex heads sized 9, 10, 11, 12, 13, 14, 15, 16, 17, and 19mm, and fit outside hex sizes 16mm,16mm, 17mm, 19mm, 19mm, 21mm, 22mm, 24mm, 24mm, 27mm.