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 Johnson Level and Tool model I tested was out of square and had an arched blade. The stamped chrome blade was difficult to read.

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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

Veritas Micro-Adjust Wheel Marking Gauge

The adjuster runs through the beam from a small knob at the back end right to the cutting wheel, which moves in and out as you turn the knob. This arrangement works well but makes adjustments a two-handed operation, requiring a little more effort.

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Bahco 6-Inch Card Scraper

The size and thickness are what matter here. A consistent performer, this Bahco scraper is found in many shops we visit.

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