Hi ! that is originally a French product made by mountain lovers (Petzl) :
http://www.petzl.com/fr/outdoor/lampes-frontales/serie-tikka-zipka/zipka-plusmine is always in my pocket, the thin thread is somewhat uncomforteable for a long job , but having a strong flashlight in the pocket is too much an advanteage, the models with a strip take more space
The batteries last very long models with only one led are better (I had one with 3 and the light is better with one I find)
When walking at night in small streets where the cars tend to go to fast, my last game is to use the blinking mode of the lamp, it project on the wall as if a police car was somewhere near and I smile listening to the engine slowing !!
I stopped using tons of Protek for years and I have less call backs for too tight centers (and dont find center pins protuberating out of the flanges as it was the case before)
Addictive product, you use it once and you are obliged to add more and more
Possibly if used only sparingly when the parts are new it is less dangerous, but general opinion here is to avoid it on a new (Renner) action
The stuff provided by Renner is similar but thicker , as I see it it only can lube (less -1-2g) a yet functional flange
The other versions provided by Renner are freeing the center Just water and propanol I believe , but results are variable
Flanges are moistened at the moment the new center is installed (new parts) that is why you see sometime those red marks around the cloth When mounting new cloth, moistening helps to have a good cloth compression, and a perfect fit (but turning steel needles are used to ream flanges, on a machine that hold a lot of flanges together on an inclined setup Too bad I don't have a picture, and sorry for the OP