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See our extensive inventory of door gap gauges
The Door Gap Gauge is a simple to use, highly efficient “must have” tool that every inspector, fire marshal, commercial property/maintenance manager and fire department needs in their toolbox. The door gap gauge has gained popularity and can be found in use across the United States
We do have a page dedicated just to learn more about our door gap gauge and a couple of door gap gauge instructional videos for your viewing pleasure.
See what our clients say about us
We are a Union install company that does a lot of OSHPD projects and the door gap gauges are nice to give to my guys to be able to check reveals and undercuts of fire rated doors. They are a nice quality tool rather than them trying to find plastic shims to check with or cutting a piece of wood. 
https://www.ggdoor.net/
"We are a Union install company that does a lot of OSHPD projects and the door gap gauges are nice to give to my guys to be able to check reveals and undercuts of fire rated doors. They are a nice quality tool rather than them trying to find plastic shims to check with or cutting a piece of wood."
https://www.ggdoor.net/
