Custom Looping Coaster was a product offered by Arrow Dynamics. It spanned over twenty years, during which twenty-five were built. Arrow also produced two standardised layouts: the Corkscrew and the Loop & Corkscrew.
The first installation, Corkscrew at Cedar Point, opened in 1976 as the first roller coaster with three inversions. It was also Arrow's first custom inverting coaster and their first vertical loop. The same year, two installations both called Turn Of The Century opened, one at each Marriott's Great America location (now California's Great America and Six Flags Great America).
In 1977, Double Loop opened at Geauga Lake with the first back-to-back loops. The following year, Loch Ness Monster opens at Busch Gardens: The Old Country (now Busch Gardens Williamsburg) and introduced interlocking loops.