Diemaster Steel Rule Dies began in a basement of West Salem, Ohio. In January 2009, Kevin Coyne purchased the business and it became Diemaster LLC in Mount Vernon, Ohio. Starting with only one employee, Diemaster has now become a leading diemaker in Central Ohio. Diemaster is continuing to flourish and has added the most advanced, high-tech equipment possible. Diemaster LLC offers full sets of tooling, from steel-rule flatbed dies to blanking units, counter plates and everything in-between.