The uniline adjustable rope lanyard is a positioning device. The unit allows the user to use one hand to adjust the length when using it during work positioning. The adjuster would be placed around a structure (wood pole, tower...) and attached to lineman's belt or harness D-rings. This unit is 8' long and comes with a swivel snap on one end for easy attachment to D-Ring and features an off-set adjustor as the attachment point for the carabiner. It is supplied with a 13154 double locking carabiner.