A split trailer shackle is disclosed, including a bolt and a reinforcing assembly. The bolt includes a rod body, a middle of the rod body is rotatablely connected with a main hook, and an upper surface of a front end of the main hook is symmetrically provided with positioning blocks; a left end of the rod body is rotatablely connected with a secondary hook, the positioning blocks are detachably inserted with a slot at a front of the secondary hook respectively, and a right end of the bolt is threaded with a nut. The reinforcing assembly includes a rotating shaft and a positioning seat, the rotating shaft is disposed in a middle of the main hook. The reinforcing assembly further includes posts. The split trailer shackle is easy to open and thus can quickly sling, meanwhile it also can be closed for lock, and the use of high security.

A heavy-duty shackle has a shackle body with two opposing end sections, each of which having a through-opening for receiving a bolt, which has a threaded section for a locknut at one end and a head at the other end, the head outer edge being non-circular. The through-openings are each surrounded by at least one nut bearing face, which is raised relative to a bearing face, directly surrounding the through-openings, for the head. An anti-rotation means for the bolt is formed in each case by a recessed head receptacle in the nut bearing face, the head outer edge being accommodated fully in the recess and being interlockingly held in place therein.

A heavy-duty shackle has a shackle body with two opposing end sections, each of which having a through-opening for receiving a bolt, which has a threaded section for a locknut at one end and a head at the other end, the head outer edge being non-circular. The through-openings are each surrounded by at least one nut bearing face, which is raised relative to a bearing face, directly surrounding the through-openings, for the head. An anti-rotation means for the bolt is formed in each case by a recessed head receptacle in the nut bearing face, the head outer edge being accommodated fully in the recess and being interlockingly held in place therein.

A shackle assembly comprises a shackle body, a shackle pin and a pin displacement mechanism for moving the shackle pin along its centerline between a shackle closed position and a shackle open position. The pin displacement mechanism comprises a rotation element which is mounted to the shackle body and rotatable with respect to the shackle body about an axis of rotation which extends perpendicularly to the centerline of the shackle pin and a transmission between the rotation element and the shackle pin for transmitting a rotation of the rotation element to a displacement of the shackle pin along its centerline.

A shackle assembly comprises a shackle body, a shackle pin and a pin displacement mechanism for moving the shackle pin along its centerline between a shackle closed position and a shackle open position. The pin displacement mechanism comprises a rotation element which is mounted to the shackle body and rotatable with respect to the shackle body about an axis of rotation which extends perpendicularly to the centerline of the shackle pin and a transmission between the rotation element and the shackle pin for transmitting a rotation of the rotation element to a displacement of the shackle pin along its centerline.

A locking shackle for use with a pin having a protruding locking tab. The shackle defines (a) an entry eyehole has a non-linear insertion channel through which the locking tab may pass; and (b) a locking eyehole having an insertion channel through which the locking tab may pass, and a locking keyhole which releasably engages the locking tab when the pin is fully inserted into the shackle.

A locking shackle for use with a pin having a protruding locking tab. The shackle defines (a) an entry eyehole has a non-linear insertion channel through which the locking tab may pass; and (b) a locking eyehole having an insertion channel through which the locking tab may pass, and a locking keyhole which releasably engages the locking tab when the pin is fully inserted into the shackle.

A hook assembly has a hook body with a shank portion and a free end portion defining a hook opening. The free end portion has a tip end with a through passage, and a key slot formed in the through passage. A removable pin is received in the through passage to substantially close an open side of the hook opening to retain items within the hook opening. The pin has a protrusion that mates with the key slot when the pin is rotated to a first position to allow the pin to be received in and removed from the through passage. The protrusion serves as a locking structure to prevent the pin from being removed from the through passage when the pin is rotated away from the first position. A spring retainer is arranged to keep the pin in its locked position.

A hook assembly has a hook body with a shank portion and a free end portion defining a hook opening. The free end portion has a tip end with a through passage, and a key slot formed in the through passage. A removable pin is received in the through passage to substantially close an open side of the hook opening to retain items within the hook opening. The pin has a protrusion that mates with the key slot when the pin is rotated to a first position to allow the pin to be received in and removed from the through passage. The protrusion serves as a locking structure to prevent the pin from being removed from the through passage when the pin is rotated away from the first position. A spring retainer is arranged to keep the pin in its locked position.

A rope (1) according to the invention comprises a main rope segment (4), a branching position (5) and an end connector segment (6), wherein the end connector segment comprises a first rope-branch (11), which comprises a first rope-branch-eye (21), and a second rope-branch (12), which comprises a second rope-branch-eye (22), wherein an attainable maximum first effective length (L1) of the first rope-branch (11) is higher than 120% of an attainable maximum second effective length (L2) of the second rope-branch (12). The rope according to the invention allows for alternative favourable manners of connecting the rope to other ropes and to other types of external objects.