Never again take down pins - Trinity Force AR15 Take Down Pin Set

I bought two sets of these extended take down pins and used one set. They get hung up both all the way in or pulled all the way out. The detent moves in the groove of the pin, but once the detent goes into the little hole at the beginning or end of the groove it is impossible to push once it with your fingers or thumb. Even when you pull on the ring and push on the other end of the pin, it don't move. I have to use a drift pin and hammer to get it started to move. Oil and grease made no difference. I think the diameter of the hole at each end of the groove is too big and lets the detent go to far into the hole. I will be removing them ASAP.