铁扣 meaning in Chinese

hasp
shackle

But the brackets are on the outside , not inside
但是这些铁扣环全部都在门的外侧，而不是内侧。
They would have a huge log or plank slid in , thus holding the doors shut
这些铁扣环中在过去可能穿过了巨大的原木，以用来将门关紧。
The doors , which are about the size of the gates of ironforge , have massive iron brackets on the outside
这个与铁炉堡大门的规格旗鼓相当的大门外侧，有着很多很多的铁扣环。