DVI cables can be used for the transmission of video data, for example, from a computer to a monitor. While DVI-A cables can only transmit analogue signals and DVI-D cables only digital signals, DVI-I connectors are able to process both signals simultaneously. Simple single link cables transfer a maximum resolution of up to 1920 X 1200 pixels at 60 Hz. Dual link cables achieve up to 2560 x 1600 pixels. Two knurled screws provide a secure hold at the housing or on the corresponding counterpart. As a result, the connection cannot be inadvertently disconnected. Monitors or computers that still have an older, analogue VGA connector can also be connected to a DVI input or DVI output using appropriate cables.