2.5 mm Ball-end Allen Key
Tool used to drive screws or bolts with hexagonal sockets. It has a metal shaft with a hexagonal cross-section. They come in different sizes for various applications.
It is important that the Allen key has a ball end:
Latin American Hub for Bioimaging Through Open Hardware (LIBRE hub)
Tool used to drive screws or bolts with hexagonal sockets. It has a metal shaft with a hexagonal cross-section. They come in different sizes for various applications.
It is important that the Allen key has a ball end: