25-piece setAllows professional unscrewing of broken screws and studsReduces time and costWith HSS drill Ø 3.2 - 4.8 - 6.4 - 8.0 - 8.7 mm, drill guide bushesIncluding drill guide bushes, drive-out bolts and screw-out adapterTwist drill made of high speed steelThe Brilliant TOOLS HSS screw extractor set BT541900 enables professional unscrewing of broken screws and studs. The set is suitable for professionals, amateurs and mechanics. For screws and screw bolts from 5 to 16 mm ( 3/16"9/16" ).With this complete set you can solve the most difficult cases of rusted, broken-off and round screws in just 3 steps. With the high-quality drill bits you can drill a hole in the threaded rod or the screw head, with small screws or thread diameters, the center sleeves help you to find the middle quickly and easily even without center punching and prevent damage to the thread when drilling. With the hammer you can create a fitting, specially shaped extractor into the pre-drilled hole, until its 6 fl