Bolt-Spec is called on by a lot of turnarounds and outages so they ordered their custom Heavy Hex Gauge in cardstock. They just give them away at the jobsite. Bolt-Spec is skilled at broken stud removal or Speed-Drilling. They are also a great source of bolting equipment. The crew from all those companies on-site want it the Heavy Hex Gauge so they can easily select and order the correct size tools for the bolting work. Because, it's no big deal if you get it right but you can be "famous" if you get it wrong!