As usual a good product from Park Tool!

great

It works well.

Well made nipple extensions are to short to do the job i needed need to be at least 3/4 to 1 in length.

Typical Park Tool quality, works great.

Simplicity at its best. Great tool & handy to keep with the tools on the bike.

A lot for what it is, but it does work well. Maybe in a shop that uses this a lot it would pay for itself, but for a home mechanic any of the cheap plastic ones that are included with stans no tubes injection tool or with a bottle of slime (if you have also purchased those types of products) will work just fine.

Great for when you break a valve on the trail or in the shop. Or if you want to top off your tubeless up with stans for a mess and hassle free refill. Cant go wrong with park tools.

Every kit needs to have one of these. Its the simple small things that usually derail the most valiant efforts.

i decided to go tubeless and this product helped me in the transition! the tubeless setup is based on the following products purchased from amazon: 1. taylor wheels- 26-inch wheelset (with mavic xm317 rims and deore xt hubs) 2. xtreme bike & sport- schwalbe nobby nic 26x2.25, ss, tl-easy (2015) 3. think fast- stans notubes 10ydx21mm rim tape 4. think fast- stans notubes 2-0z sealant injector 5. bike a mile- park tool valve core remover 6. trail this- American classic valve stem for t/less wheels products from local bike shop: 1. velox rim tape 10mm 2. stans notubes tire sealant- 16 oz tools required: 1. rim levers 2. air compressors I tried the co2 to inflate the tires, but I found that an air compressor works way better. tires are running at 35psi. I used the velox rim tape to secure the spokes nipple access and the stans rim tape to make the rim air tight. the 10mm velox rim tape is perfect for the xm317 rims because it was narrow enough to allow exposed metal contact for the stans notubes 21mm rim tape. the velox rim tape also reduces the chance that the sharp edges do not cut the stans notubes rim tape. I used the injector to put in 2-oz of sealant via the valve stem. this process is less messy than trying to put the sealant via the bead/rim gap or mounting the bead. no leaks or loss of air after 40 miles of riding as of this post! AWESOME!!! ALL THE PRODUCTS PURCHASED THROUGH AMAZON WERE PERFECT AND RECEIVED IN EXCELLENT SHIPPING TIME! tubeless is the way to go. my wheels setup are now much lighter than with the thorn resistance inner tubes (some tubeless setups are heavy than with inner tubes, so it is a good idea to be selective in what type of tires you need for your riding style). as of benefits, I do feel the bike accelerates better and seems more responsive due to less rotational mass. this tubeless setup is mounted a on a 2000 klein attitude comp hardtail bicycle. trail on!