Simple holder that uses friction to hold the plugs in place. Includes a clearance bolt for ¼-20 to secure the top and bottom with a nut using a 3" panhead bolt. 

Link to sockets: [https://www.homedepot.com/p/Powerbuilt-3-8-in-Driver-Spark-Plug-Socket-Set-5-Piece-640855/204505161](https://www.homedepot.com/p/Powerbuilt-3-8-in-Driver-Spark-Plug-Socket-Set-5-Piece-640855/204505161)