1 and 12mm wire ropes are not suitable for using 18mm heart-shaped rings. The size of the heart-shaped ring should match the diameter of the wire rope to ensure the firmness and safety of the connection.

2. Generally speaking, the inner diameter of the core ring is slightly larger than the diameter of the wire rope, which is convenient for the wire rope to pass through and connect. Therefore, for 12mm steel wire rope, a core ring with an inner diameter slightly larger than 12mm should be selected to ensure the stability and safety of the connection.