A device which can slide up and down on a chain or cable, can be loosened to attach to the chain or cable, but does not have any parts that come free when the part is loosened. The device includes first and second pieces, each made of structural material, the first and second pieces fitting together at concave and convex surfaces, to form an interlock forms inner surfaces with a through hole of a first shape that can slide along either a cable or a chain.

A invention relates to a chain shackle for fastening a hoist chain of a chain hoist to a hoisting member or the chain hoist. The chain shackle includes two identical shackle halves installable against each other to work together in such a manner that they form between them a first space for one chain loop or chain loop half of the hoist chain to lock it against the hoisting direction or force. The first space is open in a first direction in the longitudinal direction of the chain shackle. A second space is connected to the first space and intended for a second hoist chain loop that is coupled with the first chain loop or is to be coupled with a chain loop half. The second space is open in both longitudinal directions of the hoist chain.

Assembly for mooring a pile with a mooring line. The assembly according to one implementation has a frame disposed on the pile that is configured to support a connecting end of a chain, the other end of the chain being connected to the pile. The assembly having an attachment assembly having an attachment element connected at one end of the mooring line. A coupler coupled to the attachment element allows positioning the attachment element with respect to the connecting end of the chain. The coupler includes a guide for positioning the attachment element on the frame. A fixing assembly is provided allowing the interconnection of the attachment element and the connecting end of the chain.