This tile is similar to Flip-Flop Tile, but instead of redirecting balls it blocks one of the paths. It may provide interesting strategic moves - one ball can open the path for previously blocked balls. You may use a M3x8 or M3x10 screw just like with Flip-Flop tile, but 3D printable pin (also compatible with Flip-Flop and Dispenser Tiles) works well too and is more aesthetic, in my opinion - just make sure the flipper moves freely and secure the pin with a drop of glue from the bottom.