That is the biggest load of rubbish ever, not helpful and not accurate. There are loads of hardware stores all over the island which can supply you with tools at reasonable prices, Bosch, Makita, Dewalt, Hitachi, you name it you can get it here.
I wrote it as I found it.
When I spent time in Tenerife I was more than aware it was tax free, so was hoping to find a few bargains on the tool front to bring back, but I found pretty slim pickings.
Yes, there were power tools available, and yes, all the brands you mention, but that is only one type of tool, and the o.p. specifically mentioned hand tools. I didn’t find a huge number of hand tools, and certainly not much of quality. Usable -yes, GJ enthusiast quality - not much, and certainly not the selection of Spanish brands I had half hoped to find like Palmera or Irazola.
And that was 6 years ago, so I expect the OP has found what he wants by now, or imported It!