The Prime-Line N 6703 bi-fold closet top roller guide ensures smooth and effortless movement for your bi-fold closet doors, making opening and closing them a breeze. Featuring a spring-loaded mechanism, this top roller guide keeps your closet doors securely on track, preventing misalignment and ensuring reliable performance. Built to last, this bi-fold roller guide is constructed with a sturdy nylon wheel and steel components, providing long-lasting durability for your closet roller guide needs. The bi-fold closet guide is designed for quick and easy installation, requiring only a 3/8 in. hole in the top of the door, making it a convenient solution for repairing or replacing worn-out guides. Compatible with most standard closet door thicknesses ranging from 1 in. to 1-3/8 in. For further dimensional information, please see the line drawing provided.