Whether during assembly of furniture, the car or in house and apartment and, and, and ..., increasingly we encounter screws with Torx-drive: Safe against slipping of the tool and to prevent destruction of the screw head and screw in transmission of relatively high powers. I have the key phrase my daughter given to the motto "The ax at home saves the carpenter." Whether the parts do their job or consist of "floral wire", remains to be seen! H. Ermisch