This is the Forester brand chainsaw multi-tool. This tool will fit any bran chainsaw and is 100% steel. The tool has 13mm, 16mm, 17mm, and 19mm sleeve sockets, 4mm Allen key, Ruler, Bar Cleaner, File ruler, Pozidriv key (6 sided star). The case is included and has a belt loop. This is a very handy tool for anyone with a chainsaw.