Steel ball bearing suspension for superior performance. High drawer sides add strength and serve as front-to-back hangrails. Spring-loaded follower block in each drawer keeps files upright and neat. Thumb latch keeps drawers safely closed. Built-in HON® “One Key” core removable locks. Aluminum hardware and label holders. Meets or exceeds ANSI/BIFMA standards. The HON® Limited Lifetime Warranty. (Cannot ship UPS.)