Sorta/maybe. I put it on as an experiment. There are a pair of stop pins at the bottom of the side plates. I can hang the tail gate behind the pins or flip it up and over and let it hang in front of the pins. When behind it acts like a drag but will hold lighter stuff like sod while letting the gravel pass through/under. Like shown here - look close and you can see the left stop pin
View attachment 808022
With the tail gate behind the pins I can use it as a crude blade if I back into a pile of sod accumulated while cutting the road edge.
View attachment 808023
I didn't design it to do that I just found out I could after it was built.
If I flip the tail gate over so it is in front of the pins it will hold material in the box like a box blade and I can move material along the road instead of it just passing through like a land plane does. It doesn't come close to replacing a box blade but it comes in handy doing road repair work.
gg