I have three of the TMKs and two of the EFKs. For some reason images aren't working but you can click on the link. They've been out for a few years I think, I took my pics in 2017 IIRC.

[img]https://i.imgur.com/XzLs7Fr.jpg?2[/img]

The striker of the TMK is sealed under a rubber cap.

[img]https://i.imgur.com/FbDdgjC.jpg?2[/img]

I have stick on striking paper so I stuck another round on the bottom of the inside of the cap. Also, I rolled up a section cut out of a clear plastic bottle and stuck striker paper on the outside of the plastic and inserted it into the case, then added matched. That way I have a sealed 2" x 4" section of striking paper. The case is very large and holds a ton of regular UCO Stormproof. I put the big matches in for the photo but after testing I opted to have 30 or so standard UCO instead of the giant ones. There's also room for Baddest Bee Fuses and some Hammaro Tinder Card.

I wasn't super impressed by the giant Zippo Typhoon Matches. They're okay but they don't burn with the ferocity of the UCO Titans.

The EFK is also neat. Yeah, one handed. The included tinder is pretty good stuff I opted for smaller tinder and a few matches.

[img]https://i.imgur.com/SlEKMhi.jpg?1[/img]

Overall they're good products. I don't think the sparks are quite as strong with the EFK as a regular Spark-Lite that Doug includes in the PSP but it does work fine. Of the two I like the giant match case best.

I haven't tried the Zippo fire steel as I already have at least 30 fire steels.