I got this combination tool in a Israeli cleaning kit. I've always wanted to know what it was. It has a serial number, "U.S" stamped, and has N.S.R. It has what looks like a punch and three different sized screwdrivers. Anyone know what this is? Thanks Sorry if you can't read the markings, I couldn't really get my phone camera to focus. The top one is the US marking, the second is the NSR, and the last is just the tool itself.