An apparatus (10) for selectively opening up a portion of a cable (12) is provided. The apparatus (10) includes a first guide (14) arranged to receive a core (16) of the cable (12). A second guide (18, 20) is spaced laterally apart from the first guide (14) and is arranged to receive one or more outer wires (22, 24) of the cable (12). The second guide (18, 20) is also arranged to draw a portion of the one or more outer wires (22, 24) of the cable (12) away from the core (16) of the cable (12) as the cable (12) is passed through the apparatus (10) when in use.