Review on Steel Hawk Precision CNC Machined Stainless Steel Tire Air Valve Caps for Cars - Heavy-Duty, Airtight Seal, Textured Design, Screw-On, Dust-Proof - 2 Pairs - Rose Gold by Juan White

I agree with many reviewers that caps do NOT cover the entire valve stem. I'm a mechanical engineer so I used a press to tap the threads into the caps and they ended up covering the entire threaded portion of the valve stem. The company needs to work on quality control or at least get the internal threads right. I will not buy again.