What’s in your tech kit? It’s a popular question that Child Passenger Safety Technicians ask one another, so thought I would go through a tour of what I carry in my tech bag. A little background: I’ve been a CPST since 2010, and I’m about to be confirmed as an Instructor. I work for the fire department and I do a couple dozen checks a month. I have a storage trailer that contains my large backup of supplies, but here is what is in the bag that lives in my trunk and travels with me to every check.