This tool is handy for all of our bikes (both valve types). Its light, as simple to use as anything Ive run across before, and the price is great. I ride some, my wife rides a lot, and a lightweight tool that works in a variety of circumstances is just right.

I have used it a lot. It is the right combination of strength, ergonomics and utility

It works as designed.

Excellent tool, works perfectly, its build with sturdy materials and easy to use

bought it to replace cores. my tube cores are not removable, so a busted buy

Its a Park Tool. The best!

Replaces leaky valve cores easily.

Works perfectly to remove presta and schrader cores.

Very useful and easy to use!! Must have for tubeless set ups!!

Not the most important of gizmos to have in your bike tool collection, but a useful device nonetheless. I use Lezyne pumps with their screw on fitting for Presta and Schrader valves as I tended to destroy presta valves with my old Zefal (SKS) Husky and HP frame pumps. The trade off is that with the Lezyne screw on fitting, Presta valves can end up backing out of the stem when unscrewing the pump fitting. Bit amusing to see the valve assembly shoot out of the fitting, but not of benefit when in a rush. I know I can and have used needle nose pliers for tightening the valve assembly, but love my tools and knew the pliers would cause damage, so I figured why not order this not so expensive Park tool. Plus it is rather pretty. It works as it is supposed to on removable Presta fittings. Have not had need for the Schrader fitting, so I cannot offer feedback on the reverse end, nor the threaded notch in the middle (to chase, or cleanup, the threads on the stem). It makes for easy tightening, and no more flying valves. Not all Presta tubes have removable valves from what I read on Gores interwebs. Schwalbe tubes appear to have them and they are what I use. Recommended.