Yes, it is worth keeping if you have or plan on having the blue turntable. Half the track that fit on the turn table are normal couplings and half are this type. I will get you a picture.
I believe there was a set of 1 Straight Dead End Rail like yours and 1 Half Straight Rail for each one of those special spokes where a shed would go and the other regular connecting spokes was to attach thru tracks to your layout.
I believe there was a set of 1 Straight Dead End Rail like yours and 1 Half Straight Rail for each one of those special spokes where a shed would go and the other regular connecting spokes was to attach thru tracks to your layout.