Review on Enhance Engine Performance with Stanley Proto J000K Spark Plug Gap Gauge Set: A Comprehensive Review and Buying Guide by Victor Ceja

Proto tools are generally well made. This tool is cheaply made. The calibration wires themselves are fine, but the plastic ends they go in are cheap plastic. The electrode bending part on the connector is made of cheap metal and will bend at first use. I've used this tool once and can use it a second or third time before it breaks. I do not recommend buying.