Contact Company Grinding stones Abrasive materials Manufacturing process Quality Company Rail care Machines Development Your benefit Downloads Company A.S.I. is a member of the SPENO INTERNATIONAL Group of companies specialising in rail maintenance, technology, diagnostics and rectification. Since 1978 A.S.I. SpA located in Marcon, near Venice, has been producing grinding stones used in grinding of the rail tracks by the grinding trains of SPENO INTERNATIONAL SA and their customers all over the world. Thanks to many years of specialization in this specific field and to a production system in a continuous stage of development, A.S.I. products now boast the highest standards in technology.