Needs modifications to work properly.
This could be a very handy tool right out of the box but I did have problems with mine. Once I hooked it up to my bleeder valve and started bleeding my brakes the check valve continually blew off the end of the clear tubing. It did this even with the valve spring setting at its lowest. I ended up purchasing a very small hose clamp to hold the check valve onto the tubing. This should have been supplied in the first place as part of the tool construction. Once that was attached the tool worked fine.