Emergency Contact Home About Us Aggregate Industry Mining Industry Capabilities Quality Policy Safety & Environmental Employment Contact Us The Frog, Switch & Manufacturing Company We are a world leader in the manufacture of manganese steel castings for the crushing and grinding industry. For over half a century we have served a global base of OEMs, metallic mines, and aggregate plants. Our castings are shipped all over the world. A long and fascinating history has led the company to where we are now – a major crusher parts supplier to the aggregate industry and to the growing global commodities markets of gold, copper, and iron ore. Employment Opportunities Available! Click here for openings and an application. 600 East High Street Carlisle, PA 17013 Aggregate Industry | Mining Industry | Capabilities | Quality Policy | Company History | Safety & Environmental | Contact Us Copyright 2013 Frog, Switch & Manufacturing Company. All rights reserved.