Professional screw extractor set for commercial or occasional use Suitable for the removal of stubborn, rusted, stripped, seized screws or bolts Simply insert the specifically designed bit and put the drill in reverse to remove the bit Centre on the screw head or middle of bolt and activate drill for easy and accurate removal without any damage to the thread Suitable for all types of cross, T stars and integral hexagonal screws Fits all drills whether electric or air Manufactured from 4242 steel for strength and durability Hex head to stop the bit from spinning in the drill in stubborn circumstances SET INCLUDES THE FOLLOWING SIZE EXTRACTORS • 0# - Suitable to drill out screws up to 1/4" / 6mm • 0# - Suitable to drill out screws up to 5/16" / 8mm • 0# - Suitable to drill out screws up to 3/8" / 10mm • 0# - Suitable to drill out screws up to 1/2" / 12mm • 0# - Suitable to drill out screws up to 9/16" / 14mm Comes in a blow molded case for easy storage and transportation