I do not have a link but here is the info on the stop package. Do not know the original use for them but it worked great because it was a single hole mount with a double stop. i did have to modify a bit as the hole needed to be enlarged so I drilled that and on the underside it had some type of locating pin I had to grind down. I also use 5mm housing for the brakes and derailluers. The package came with for barrel stops, 2 for the f/r derailluers and two for the rear brake stops. I needed on more for the rear derailluer so for that i used a barrel adjuster from a broken shimano shifter combo and a stainless nut to lock that on. Also had to add a standard Shimano BB double cable guide on the shell.