Made of high strength Cr-Mo steel with high hardness, these lug nut removal sockets are more sturdy and durable. This is 14 pieces nut remover set that can be used with 3/8" square drive wrench, ratchet, or breaker bar for removing damaged, frozen, rusted, rounded-off bolts, nuts & screws. Standard 3/8-inch drive and 1/4-inch hex drive to 3/8-inch drive adapter to let the extractors compatible with common or heavy-duty power tools, drivers and screwdrivers handle tools. The 6-point spiral socket design allows a secure connection to the rounded-off fastener to be extracted. These Locking Wheel Lug Nut Removal Tools fit hex heads sized 6.35mm(1/4”), 8mm(5/16”), 9.5mm(3/8”), 10mm, 11mm(7/16”), 12mm, 12.7mm(1/2”), 13mm, 14mm(9/16”), 16mm(5/8”), 17mm, 17.5mm(11/16”), 19mm(3/4”) to quickly replace rusting, rounded, or stripped lug nuts and bolts.