Kit for HON file cabinets F24 & F28 style - lock supplied keyed alike to the number 10 key, includes 2 number 10 keys in each kit. Includes parts shown - also includes adapter plate for older file cabinets. Click on the pdf file for installation instructions. This F24 kit fits the following knockout dimensions: the Hon knockout measures 5/8" side to side (horizontal), and 3/4" top to bottom (vertical). Old style uses #10 key, new extractable plug uses 10E key - 10E key will work in both older and new locks.