`These screw extractors enable rounded or rusted hexagonal screws  and nuts on threaded bolts to be removed

`Just attach the necessary extractor screw and turn it anticlockwise  with a spanner or wrench

`The special moulding catches onto the screw to be removed and  loosens it.

`With size 9,10,11,12,13,14,15,16,17,19MM

`Material: CrMo