Definitely a cleaning rod. You'd be surprised at the number of times mine has been used to tap out some other shooter's squib load that was stuck in the barrel (I also pack along a small brass hammer for that purpose), as well as the previously mentioned screw drivers. When I was shooting Ubertis, I also carried an extra hand and hand spring. I carry extra eye and hearing protection. Where I shoot in South Central Texas, I always carry at least a couple of bottles of drinking water, and sun blocker, especially in the summer. Also in my cart is a plastic rain poncho that I've had to use more than once to drape over the cart when a surprise rain shower shows up. A couple of bungees are also good to have along.