safer brand victor m380 fly magnet reusable trap with bait (pack of 3) safer brand easy assembly lets you quickly convert existing file drawers into an efficient hanging file system. notched side rails snap off easily in 1" increments to conveniently fit any drawer length 12" to 24". also work great on your desktop. sturdy adjustable corners. hanging file frame type: drawer frame/desktop frame; for file size: legal; letter; a4; length: 12"; maximum length: 24". sold as 4 pack