The receptacles are made to suit the varying nature of the material. These small Bleichert couplings for an upper haulage rope have the advantage that at the terminals, and when negotiating curves, no shunt rail is necessary, as the clips will pass round the guide wheels and terminals. With the haulage rope below the rail rope this would not be possible except with an arrangement similar to that shown in the figure. This diagram shows also a different type of bucket with its accessories, having four rollers. Here the clip is so designed that one portion also carries the pin for the suspension of the frame for the bucket.