ESE Machines, Inc. makes tools and machinery for standing-seam roofing and portable rollforming, building on a roll-forming process first developed by founder Ewald A. Stellrecht in 1976. The Coatesville manufacturer designs and makes its equipment in the USA, including the K9 power seamer and the hand seamers that helped establish its place in the metal-roofing trade. Its open resource guides and equipment-support materials reflect more than five decades of specialized knowledge shared with roofers and fabricators.