Rather crude (putting it mildly) home-made lap-steel, I'd definitely say.

You need one of https://www.ebay.co.uk/itm/Lap-steel-tone-bar/112779358761?hash=item1a422c7229:g

Perhaps tune to something like DGDGBD, DADF#AD for a first attempt. DGDGBE (G6/Em7) would give you some minor key options.

You can use a plectrum or right hand fingers, I believe.