🔧 GEARWRENCH Feeler Gauge Set with 12 Blade & 6 Wire Spark Plug Gap - 164 Review

imperfections to ensure I can change spark plugs properly in Craftsman lawnmowers. This tool is compact and available in different sizes. Appears lightly oiled to prevent rust. Should prove useful in the years to come.

The gauges were surprisingly accurate. When I received this I was using a micrometer and expected the gauges and split wires to be larger or smaller due to the price of the item. I was quite surprised to find that a set of machine micrometers had an error of several ten thousandths (0.0001). Because they are so close together I feel confident enough to use them for valve adjustments when rebuilding my engine.

Not very clear in photo but comes with spark plug bender and gap adjustment tool. This is a great combination tool as it includes gauges for checking regular spark plug gaps and a set of feeler gauges. The belt tension can be adjusted by tightening the knurled nut. The metal appears to be of good quality. The dimensions on the blades are laser engraved and listed in imperial and metric units.

These sensors work fine. I've found slight differences in thickness around different parts of the scale (the tips tend to be thicker than the middle). I don't have a tool that can measure the variance, but it's pretty small. This is also the first set of sensors I own so this may or may not be typical. I used them to test a set of spark plugs that were preset at .022. When measuring the gaps of my spark plugs, all of the plugs matched the center of the gauge (near the sticker), but a few got…