Review on 🔧 Ullman Universal Spark Plug Gap Gauge, 1-1/2" Diameter - Accurate and Versatile Tool for Adjusting Spark Plug Gap by Seth Bushey

Difficult to read. It's a little different from the picture with the numbers and lines darkened. The processing of the tool also differs somewhat from the illustration in the description. When using the millimeter scale, the spark plug hits the inside edge of the tool so I can't read the scale when measuring the spark plug. This is probably common to all instruments of this general type. Accuracy seems good compared to my stylus set. The stomata part of the tool seems to work fine. However, the design of the tool does not provide for a reduction in the gap. I can return a tool of a different brand and/or design.