Built to resist corrosion and last in harsh environments, these vertical rulers are iron with a porcelain-enamel finish.

Attach a plumb bob (sold separately) to the rope’s hook and lower it into your tank to take a measurement.

Replace your try square, miter square, depth gauge, marking gauge, 90° level, ruler, and scriber with one tool.

Also known as surface gauges, use these to scribe lines, transfer measurements, or as height and depth gauges.