High Quality Material: Made of 42CrMo Ultra-high strength steel with high strength, toughness and good hardenability, these lug nut removal sockets are more sturdy and durable. Bolt Extractor Socket Set: This is 5 pieces nut remover set that can be used with 1/2" square drive wrench, ratchet, or breaker bar for removing damaged, stripped, rusted, or stuck fasteners (screws/nuts/bolts). You can unscrew the rusted bolt more easily. Compatibility: These Remover Extractor tools can be driven with a metric spanner or socket for fast work. The 6-point spiral socket design allows a secure connection to the rounded-off fastener to be extracted. Application: These Locking Wheel Lug Nut Removal Tools fit hex heads sized 17, 19, 21and 22mm to quickly replace rusting, rounded, or stripped lug nuts and bolts. This set includes a unique punch tool to help extract the damaged fastener from the socket., Manufacturer: LIYOU