








⚡ Spark the perfect gap, ignite peak performance!
The Toolwiz Spark Plug Gapping Tool set includes two precision gap adjusters for 12mm and 14mm spark plugs plus a 32-blade steel feeler gauge with dual metric and imperial markings. Designed for easy, damage-free adjustment via a screw knob, it ensures optimal spark plug gaps to boost engine efficiency and reliability. Compact and lightweight, this professional-grade toolset is essential for mechanics and enthusiasts aiming for flawless ignition performance.
| Manufacturer | Toolwiz |
| Brand | Toolwiz |
| Item Weight | 8.1 ounces |
| Package Dimensions | 5 x 2.13 x 1.26 inches |
| Manufacturer Part Number | THT30732 |
N**L
Works well
Cool tool. Great labor saver, can do a set of 24 plugs in 10 minutes with this.
W**I
One is king…
I ordered both the long tool with feeler gauges and the two piece 12/14mm set to try out. I can say for my situation I got it for the long tool is far superior. I had to gap some plugs down to .025 and the long one easily flattened the electrode whereas the screw in type still left it at an angle. I think if you cranked on it with a pair of pliers you could flatten it, but… if you have a very small gap to do get the long tool. Otherwise save some bucks and get the other. Or if you don’t have a gap tool/feeler set get the longer one and come out ahead. Both types work, but one is better at least for smaller gaps.
A**R
Spark plug gap reducer.
Looks to be good quality just needs better packaging for shipment.
S**F
Amazing vs traditional methods
Worked great for my NGK iridium spark plugs, didn’t know these existed vs traditional old methods.
B**E
Out of the park.
An excellent, practical tool.
K**R
Simple
Worked perfectly. Simple tool and simple to use.
D**T
Good Product
Item was as posted. Very happy with it.
A**E
This should be in every mechanic's tool box
There are some other brands that make this or something similar. But the Toolwiz brand is built as well as you'd hope for. They took care to use materials that wouldn't damage spark plug threads, tip, or the ceramic. Well thought out.I like it for the progressive and precise way of closing gap. The holder doesn't damage the plug/ceramic, and the block that pushes down the tip is shaped correct and made of a nylon so no scratches. You turn the knob until it's just below the gap you desire, then back it off and check. Adjust it back down as needed because the tip has some spring back to it. My methods of gapping in the past have never been as precise or safe.One final recommendation. Although the feeler gauge is alright to check gap. Since you're never at a perfect flat plane with it, it's good to use a standard coin/ring gap checker as well to verify with as well.