TABELLA 1 SQ DRIVE 4 POINT IMPACT SOCKETS 1 Avvitatori per assemblaggio industriale The best quality of a screwing compass can be found in the ability to withstand the greatest number of impact blows generated by the tools, by the precision with which the coupling between the exit shaft of the screwdriver and the drive (square drive) of the compass and the quality of the material in which the compass is made. The OZAT compasses by Airtechnology are made with special processes that combine the traditional electroerosions in a special chemical bath. This process gives the bushes characteristics of resistance to wear and strength to use unique in the market.