Loc-Line® is the originator of the modern modular hose concept, and the premier coolant hose brand from Lockwood Products. Originally introduced in 1983, Loc-Line was created as an innovative alternative to the traditional coolant hose in order to fix durability and positioning issues. Throughout their 34-year production history, Loc-Line has proudly manufactured all of their coolant hose sets, parts and accessories, and Quick-Set Shields™ in America.