Review on 🔧 NeoPRO Presta Valve Extension Kit (2-Pack) with Valve Key and Cap - Choose from 4 Lengths - 20mm Black by Ernest Etienne

Not suitable for Vittoria Presta valves. I put it on, pumped up the wheel and it just flew across the room. By threading it into the valve, a small amount of thread went further into the valve than the number of threads that would have held it in the valve. You could screw in further as if you stripped the threads, but you didn't strip them - they went too far to create a gap. Waste $$