Unknown tools nº8 - Eccentric extractor for studs

Unknown tools nº8 - Eccentric extractor for studs Eccentric extractor for studs This extractor consists of a cylinder and an eccentric roller The two sides have striations for a strong fixation to stud Introduce the extractor into the studs ... Turning the extractor, the eccentric is fixed strongly This model is for thicknesses from 8 to 19 mm Now three tests: thickness minimum, intermediate and maximum To remove the stud we release this screw In some studs, we have to apply some blow to the eccentric to start the grip