Since its founding in 1942 by Leonard J Newon, Sr., Dual Manufacturing Co., Inc. has produced testing sieves and related products and has become the industry leader. Today, the Newon family still faithfully uses his manufacturing methods of production while incorporating state-of-the-art machines to accentuate the skills of the tradesmen. In addition, Dual Mfg does not subcontract any part of the manufacturing process.