This is a Twin 1/4" 6.35mm 2 Pole Jack Plugs to Single 1/4" 6.35mm 3 Pole Jack Plug cable. Ideal for splitting a stereo signal into LEFT and RIGHT signals. This ProSound Twin 1/4" 6.35mm 2 Pole Jack Plugs to 1/4" 6.35mm 3 Pole Jack Plug Cable can also be used to combine 2 MONO signals into one stereo input. A specialised cable for any musician or DJ, with heavy-duty cable and connector construction and full signal shielding, great for stage, studio or home use.