This is a PCB mount right angle 4mm double banana socket.
Red Alligator clip with pushbutton, with 4mm. banana jack connection.
Black Alligator clip with pushbutton, with 4mm. banana jack connection.
This multiple purpose test leads cable is used for mobile phone repairs: includes 1 pair of red/black banana plugs, alligator clips, test hooks and 1 female USB interface.