Momentous Mold & Machine traces its roots to Karl A. Reuther’s 1950 family business in Cuyahoga Falls, where it first became known for rubber molding before moving into demanding aerospace work. Purchased in 2025 by a Northeast Ohio management team, the company now brings that long manufacturing history to custom tooling for aerospace and related high-consequence applications. Its 60,000-square-foot temperature-controlled shop is supported by AS9100D:2016 with Design and ISO 9001:2015 with Design certifications.
ISO 9001:2015 with Design
certification
AS9100D:2016 with Design
certification
ITAR Registered
registration
AWS D1.1
certification
AWS D17.1
certification
Rhinestahl CorporationWhat began in 1967 as a two-car-garage tool shop has become Rhinestahl Corporation, a Mason-based manufacturer of aircraft engine tooling and complex precision assemblies. Its Customer Tooling Solutions division supplies OEM-aligned engine tooling, while its Advanced Manufacturing Group handles demanding machining, fabrication, and capital-equipment assembly for aerospace and other industries. Rhinestahl’s manufacturing operations include a 125,000-square-foot Mason facility, and its AMG division holds AS9100D/ISO 9001 and ITAR certifications.MASON, OH
Prospect USASince 1945, privately held Prospect USA has grown from a mold shop into a Cuyahoga Falls manufacturer serving customers around the world. With more than 120 employees, the company is best known for aerospace composite work and supplies manufacturers and their Tier One and Two partners in demanding commercial and defense programs. Prospect operates under ISO 9001 and AS9100D certifications with design registration.CUYAHOGA FALLS, OH
Contour Tool Co., LLCFounded in 1986 as a quick-turnaround tooling shop, North Ridgeville’s Contour Tool now makes complex, close-tolerance components through precision CNC machining. Its experienced tool and die makers specialize in the difficult work larger shops may decline, while in-house fixture building, engineering support and assembly allow the company to carry projects from machining through completion. Contour is ISO 9001:2015 certified and AS9100 compliant, with an especially strong record in aerospace and other demanding industrial applications.NORTH RIDGEVILLE, OH
Eagle Mold Co., IncFounded by Wilbur Wisecup in his home garage in 1984, family-owned Eagle Mold Co., Inc. designs and builds precision plastic injection molds and supplies close-tolerance machining and EDM work from Carlisle, Ohio. The company has grown into two facilities totaling 58,500 square feet while continuing to serve demanding automotive, aerospace, and medical applications nationwide. Eagle Mold has maintained ISO 9001:2015 certification and has supplied tooling for 40 years.CARLISLE, OH