Profile: Matweld, Inc. renders products for the railway industry. We are source for tools, equipment and railway products. We offer after the sale training and service. Our product line includes power units, grinders, weld shears, spike pullers, tampers and spike drivers. Our straight stone grinder is a powerful and safe grinding tool for use on field welds, frogs, and switch points. The tool has an on-off valve or trigger, high strength aluminum housing and rigid handles for safe.