Silverline Spark Plug Gap Tool, Spark Plug Tool 0.5-2.55mm / 0.02-0.1", Nicking Tool Spark Plug Gap Gauge Hand Tool Sets Spark Plug Removal Tool Chain Gap Adjustment Gauge Tool Spark Plug Sleev

Very pleased with the gauges for the money. Needed them to check my valve clearances on a motorcycle engine and the set I had previously did not have the range of measurements required. These have plenty of options and were very accurate when double checked with mitotoyo digital calipers. Some reviews mentioned the oil, but it isn't a big problem when compared to the oily insides of a bike engine :). Quick careful wipe and they are fine. The blades are marked in inches and mm, and on one occasion I mixed the two numbers up, but quickly spotted my mistake.

Very good set.

Good value set & cover most sizes you need

would usually use gauges until i see this product and i wouldn't go back, its helped with my spark plugs a lot and its very simple to use and can even be put on your key chain as it doesn't take too much space, the measurements are correct and it works very well in gapping the plugs to your desired spec.

Handy

Excellent price, fast delivery and seems of decent quality.

Wasn’t too sure whether to buy this gauge as I was used to the old type which isn’t recommended with new Plugs with more delicate iridium tips. After purchase and using a few times found it easy enough to use and adjust the gaps if done carefully enough. Functionality is good

The gauges seem fine, but come soaked in oil to the point that it's difficult to use them for their intended purpose without cleaning them all individually first if you don't want to soak your hands and whatever you're measuring.

"Flanged hole" for gapping the plug was so poorly machined it couldn't be used, often is also NOT a Silverline tool as described.