Mike Newberrywrote a review of Park Tool 3-Way Hex Wrench on August 20, 2019
Familiarity: I've put it through the wringer
Park Tools...nuff said. I've used both Park and Pedros....both reputable, both durable. A three-way (3mm, 4mm, 5mm) is a very useful tool if you don't want a bunch of loose t-handle or allen keys rattling around in your tool bag. I use the regular ends. I don't like the balldriver ends...those round off easily, just my opinion.