This is my first experience with the #118 shelf coupler. I'm trying them out on a pair of tank cars that I had Kadee #5s on. The mount the same as the 5 except these are whisker couplers. They couple well with the standard head couplers as well as the scale couplers. Uncoupling by hand is a little difficult due to the shelf lip on the coupler. They work just great with the uncoupling magnets. Love them, I want to equip all my tank cars with them.