Daisy chain (climbing) has use aid climbing
Rock-climbing equipment requires a range of specialized sports equipment, for training, for aid climbing (i.e. to assist in ascending by artificial means), and for free climbing (where protection equipment is needed against the consequences of a fall).  Developments in rock-climbing equipment played an important role in the history of rock climbing, enabling climbers to ascend more difficult climbing routes safely, and materially improving the strength, conditioning, and ability of climbers.Daisy chain
A daisy chain is a strap, several feet long and typically constructed from one-inch tubular nylon webbing of the same type used in lengthening straps between anchor points and the main rope. The webbing is bar-tacked at roughly two-inch intervals (or, in the past, tied) to create a length of small loops for attachment. Unlike the use of similar devices in backpacking, daisy chains in technical rock climbing are expected to be of sufficient strength to be "load bearing". Daisy chain pockets, however, are not rated to full strength, and can only take static loads.
When clipped in, daisy chains should not be shortened by clipping in another pocket to the same carabiner. Failure of the pocket stitching results in the daisy chain disconnecting from the anchor, with potentially fatal consequences. If shortening the daisy chain when clipped in, in order to eliminate dangerous slack, a second carabiner should be used to connect to the anchor.Though daisy chains are sometimes used by free climbers as a type of sling (a quick attachment used from harness directly to a belay anchor), and for ad hoc purposes similar to those of the backpacker, the canonical use for a daisy chain is in aid climbing, wherein the leader will typically attach one end to the harness, and the other to the top-most anchor placement (by carabiner or fifi hook), particularly after having ascended in étriers as high as possible. This allows the leader to hang from the daisy chain while preparing the next anchor placement. The closely spaced loops allow fine-tuning the length from harness to anchor, thereby allowing the best possible reach for the next placement.
Daisy chains should not be confused with étriers, also known as aiders, which are short ladders made in the same way, but with larger loops, also used in aid climbing, nor with load-limiting devices often known as screamers (from their first trade name) designed to simulate a dynamic belay.