Precision Screwdriver Set - Hex 1/16x6-1/8 Inch for Electronics, Watches & Small Appliances Repair | Professional Tool Kit for DIY & Home Improvement Projects

For whatever reason, all three of these tools did not fit the application as if they were incorrectly manufactured. I tried them on three set screws on three knobs. They were too small even though I did order the correct size/dimension (1/16). Verified it with an allen tool (1/16") and another of the same brand tool bought elsewhere (by my employer). Both fit the subject knobs properly. I ended up buying a set of bits to do the job.