The BlueSpot 10 PCE Bolt Remover Set is manufactured from heat-treated chrome-molybdenum for increased durability. Designed for the safe removal of bolts that have rounded off, rusted or painted over. Suitable for hand and power tools. Can be used with 3/8” breaker bar/ratchet and also has flats so that they can be used with spanners or wrenches. Complete with a useful carrying case for quick and easy storage.