A combination square is a vital tool for performing the most basic shop operations, such as layout, marking, measuring, and machinery setup. Its versatility is unparalleled by any other single tool. The two main components of a combination square are the head and the blade?what manufacturers call a two-piece set?and that’s all you get with most of the lower-priced tools. In the higher price brackets, the major brands offer center heads and protractor heads, resulting in a four-piece set, for about double the cost of the two-piece set. Fortunately, buying a combination square is likely to be a one-time purchase because all of the better models will outlast you.

The Empire was a bottom-of-the-line tool with an inadeqaute locking mechanism. A plastic insert allowed movement and will wear down quickly. Overall, the tool was awkward to use. The stamped steel blade was difficult to read, and the model I used had a burr on the end from the machining process.

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Tite-Mark Marking Gauge

These gauges can be easily and precisely adjusted with one hand, which allows you to set the tool while holding a ruler or workpiece in the other. The quality is exceptional, and all have sharp cutters that offer great visibility.

Buy at Lie-Nielsen Toolworks

Marking knife: Hock Double-Bevel Violin Knife, 3/4 in.

This heavy, double-beveled knife stays on track in all directions, and works just fine without adding a handle.

Buy at Lee Valley

Starrett 4" Double Square

Head is easy to remove, replace, and lock down; narrowest blade, at 5⁄8 in., made it easier to fit into tight places; hard to read under bright lights.

Buy at Woodcraft Buy at Amazon