This set combines all the tools you need to have a starter set of marking tools. The set includes two solid steel engineer's squares (50 & 100mm); a 50mm centre square for marking centre on round stock; an adjustable square fitted with a 150mm graduated rule; a scriber and centre punch. These are all housed in a plastic storage case. This is a heavy duty set designed predominantly for metal working, but just as useful for your woodworking projects. Centre punch is spring loaded to help prevent 'skipping' after being struck.