The gold standard in 0.1”-pitch is the Amphenol Mini-PV, the great-granddaddy of them all. The product line was once owned by DuPont, which is where the cheap Chinese “DuPont” connectors got the name (even though they aren’t actually clones of Mini-PV, but most likely the JST RE series, or Harwin M20. Unknown which of those came first.) The ultra-high-force variant of the Mini-PV contact holds extremely well, and according to Amphenol, the “PV” stands for “perpetual virgin”, because they’re designed for high mating cycles (1000, IIRC).
TE’s AMPMODU (MOD IV and MOD V, specifically) and Molex SL are also excellent, but not quite as good as Mini-PV.
Honorable mention goes to Harwin M20, which looks absolutely identical to Chinese DuPonts, but actually performs really well. They don’t loosen up after three cycles like the Chinese ones.
Mini-PV, AMPMODU, and M20 all offer 1-pin housings. (Though the Mini-PV one is grotesquely overpriced.) Molex SL does not, which one reason why you see them in heat shrink. The other is that many grabbers simply don’t have room around the pin for the 1-pin housing.
Most EZ-hook products (and clones) use a 0.025”/0.64mm square pin, and any of the contacts listed above will work for those, and I would not dissuade you from using Mini-PV, AMPMODU, SL, or M20.
But a grabber models use a 0.04”/1.02mm round pin. For those, you use a single female standard D-sub contact, with heat shrink. Those can be anything from the cheapest folded, stamped contacts, to $6-each mil-spec machined contacts with precision leaf springs or lantern-style internal spring contacts.
Finally, some grabbers (from other manufacturers) use a 0.5mm or 0.6mm round pin. 0.6mm ones will hold reasonably well in a socket for a 0.64mm square pin, but may be a tad looser. You can get nice sockets for both 0.5mm and 0.6mm from Mill-Max and Preci-Dip. Some of theirs are also expressly stated as being compatible with 0.64mm square pins. Expensive and durable, but retention force is not particularly high.