Which tool is best for cutting a straight edge?

• A. Straight-blade snips
• B. Aviation snips
• C. Tin snips
• D. Water level

Answer: (A)

When you need to cut a straight edge on sheet metal, the tool design that matters most is a straight cutting edge that can follow a guide cleanly. Straight-blade snips have blades that run in a straight line, which lets you guide the cut along a ruler or chalk line with minimal drift. That setup gives a clean, true straight edge, especially for long cuts.

Aviation snips are built to handle curves and irregular shapes, or require extra control to steer straight lines, which can invite slight wandering over a long cut. Tin snips are versatile for many cuts but aren’t specialized for maintaining a perfectly straight run like a straight-blade snip. A water level isn’t a cutting tool at all, so it can’t produce a cut.