i happen to have access to calibration equipment at work, and the ones i bought (i cant say all of them) are right where they belong (actually within 1% iirc). The 3/8 is definitely a higher torque than you need for most bike stuff, but the 1/4 works well (just have to convert NM to inlbs. . . ) I have a $150 craftsman 1/2 drive that i use for most car stuff (it does up to 250 ft-lbs), if i find a good deal on a 1/4 one i may upgrade, but with the known point of mine at this point its not a huge concern(i did have the concern that they would be inaccurate junk, but they seem to be good, as are a couple of my friends who have bought them recently, HF seems to be stepping up their game lately)
i think these are the adapters that i have
https://www.harborfreight.com/4-pc-high-visibility-socket-adapter-set-62851.html
i also like HFs lifetime guarantee on pittsburgh tools, if you break it they replace it (this includes torque wrenches) so the sockets/keys im perfectly ok buying from them.