Those Ernst wrench rails - is the magnetic tape strong enough to stick ok through a thin (3-4mm) drawer liner?
I own several of the Ernst gripper wrench holders; they are not magnetic.
I also own a number of Ernst socket rail mounting kits. All have magnets and none are strong enough to stick through the drawer liner. I have the Craftsman non-skid type drawer liner.
Because at a later date I may decide to trash the drawer liners or reconfigure the setup, I'm not sorry that I got the magnetic mounting kits.
A note on the Ernst socket rail mounting kit: When placed in the horizontal position, the socket rail only engages the middle mount, the socket rail simply rests on the other two, upper and lower, mounts. When placed in the vertical position the socket rail hangs from the upper mount, engages the middle mount, and rest on the lower mount.
I use my socket rails in a tool box and since the magnets do not stick through the liner they can, initially, be a little irritating. If the rails/mounting kit is placed perpendicular to the drawer's slides all is well. If the rails/mounting kit is placed parallel to the drawer's slides, upon closing the drawer the socket rails tend to slide toward the back of the drawer.
This is only an issue for my 13" long 1/4" drive rails which are placed in the drawer longways front-to-back. I resolved the issue by simply sliding the socket rails back so that they touch the back of the drawer. My 3/8" drive and 1/2" drive rails are placed longways side-to-side, perpendicular to the drawer's slides.