When I tried to repair the pla rail, I bought it because the screw head was △.
There are two sizes, the larger one fits.
It is slightly inconvenient that the metal part is easy to escape from the holding part.
Although I felt that I could fit a bit of bit into the grip tightly, I was able to use Cospa at its best. Purchase for the repair of the locomotive of a child 's plarail. Even cheap toys, I hope that children will learn the importance of treating things by showing them to repair and use long.