The allen key head screws are a great way to torque them nice and tight without fear of stripping the head, although somewhat slow and cumbersome, so be prepared to take your time. I am glad I bought this charging case thought these would work. And AirPod pro have pretty good noise canceling. Its a great noise-canceling headphone for travel (especially air travel where noise canceling is the most paramount) but the sound is very thin and sculpted compared to the Shures. Position the clamp to press the bar stock bit onto the glue in the space between the screw holes. For the price, get the Sony ECM 44. No idea why I tried a toothbrush, but it works. I assumed that the previous users were just incompetent so I had went ahead and purchased it. The other reviews have said they work and fit perfectly so maybe I got a bad set.