The parent company is Danaher, which owns Fluke, Pomona, Keithley, and Tektronix.
Looks like Keysight 34133A is also a Pomona OEM. Keysight 34144A=Pomona 6341=Fluke TL910 to my eyes.
All those are the same part with Pomona as the OEM, but the Keysight package doesn't come with the spare tips? The Fluke markup is "interesting".
As with many others experience of these miniature probes, they don't have a particularly good lifespan and breaks in the fine cable occur far too often (around 1 year was typical). Since the tips and sockets are standard parts a more robust version that terminates into generic banana leads could be popular if there is an enterprising person out there with access to overmolding.
Fluke have their own surge-grip line of cables, probes, and grabbers/hooks. Most of it is targeting industrial electricians but they have a wide range of probes and grabbers suitable for electronics if you can get a chance to play with them in person before purchasing. For anything smaller I switch to logic analyser style pin header clips and probes wired onto RG316 coax.