ad: HON 4-Drawer Letter File - Full-Suspension Filing Cabinet with Lock, 52 by 25-Inch Black (510 Series - Model 514PP) We make a very strong case for 510 Series vertical files from HON. Our case is built on a solid foundation of manufacturing excellence, using advanced machinery and continuous quality testing. HON 510 Series vertical files are clad in solid steel plus reinforced inside with vertical struts and a double-walled kickplate. Lock and label holders are standard. The hand..