Which tool is specifically used for removing metal corners and deburring in airplane assembly?

The tool specifically used for removing metal corners and deburring in airplane assembly is a disc and belt sander. This equipment is designed to smooth out rough edges and surfaces, which is crucial in aerospace assembly where precision and safety are paramount. The disc sander effectively removes material from flat surfaces, while the belt sander can be used on more complex shapes, ensuring that all edges of metal components are properly finished to avoid sharp corners that could lead to injuries or structural issues during assembly.

In contrast, a router is generally used for hollowing out an area in hard materials like wood or plastic and is not typically employed for deburring metal edges in aerospace applications. A drill's primary function is to create holes in materials but does not serve the purpose of edge finishing or deburring. A jigsaw is mainly used for cutting shapes in materials and lacks the capability to smooth edges effectively like the disc and belt sander does.