Founded in 2023 by William F. Marcell II and Janine Koi, Standby Black Oxide Products is a privately held, Marcell family-operated company rooted in the Standby Screw Machine Products business. Based in Cleveland, Ohio, it combines an automated black oxide line with in-house control to deliver consistent finishing results for customers’ manufactured parts.
Cleveland Black OxideSince 1941, Cleveland Black Oxide has built its identity around helping manufacturers finish metal parts, with customers spanning the United States and Canada. The Brooklyn, Ohio company is known for black oxide coating work on demanding applications and has maintained ISO 9001:2015 certification since 1994.CLEVELAND, OH
Standby Screw Machine Products CoFounded in Cleveland in 1939, Standby Screw Machine Products makes custom precision-machined parts for customers ranging from automotive manufacturers to equipment makers. Still privately owned and operated by the Marcell family, the company has grown from two screw machines into a 200,000-square-foot, three-facility operation with 300 employees worldwide. Its Berea, Ohio plant and overseas facilities are ISO 9001:2015 registered, supporting both prototype work and high-volume production.BEREA, OH
Cleveland Steel ServicesCleveland Steel Services traces its machining heritage to 1956 and produces high-tolerance CNC-milled and turned components in Cleveland, Ohio. Acquired and rebranded in 2022, the shop combines the legacy of Murray Machine & Tool with veteran-led ownership and modern subtractive manufacturing for demanding American industries. It is also a State of Ohio Certified Veteran-friendly Business Enterprise.MIDDLEBURG HEIGHTS, OH
Boville Industrial Coatings, IncFounded in Smithville, Ohio, in 1970, Boville Industrial Coatings applies industrial finishes and protective coatings to parts ranging from production components to military armored plates. The family-run company is led by founder Larry Boville Sr. alongside his son, Larry Jr., whose combined experience exceeds 90 years. Boville processes more than 200,000 parts annually in small and large quantities and employs 35 people.SMITHVILLE, OH