I inherited my brother-in-law's tools 25 years ago. He was an aspiring mechanic and worked mainly on original VW Beetles and the occasional BMW or Porsche. He left his life and possessions a scattered mess and it was many years before I was able to assemble and ID most of his stuff. These pieces are the only things that I can't figure out and they may or may not even go together. The three pieces are SAE threads and the 5 piece set is metric. Any ideas? Thanks.