The BlueSpot Bolt Remover Set is manufactured from heat treated chrome molybdenum steel for increased durability. Designed for the safe removal of locking wheel nuts, bolts, screws and studs. Suitable for hand and power tools. Can be used with 3/8in breaker bar/ratchet. Complete with handy carrying case for quick and easy storage. Sizes 9, 10, 11, 12, 13, 14, 15, 16, 17 & 19mm.