Rope splicing fids are tools used in rope work to assist in splicing, which is the process of creating a permanent join between two ends of a rope. Splicing fids are typically long, pointed metal or plastic tools that are used to separate the individual strands of a rope and tuck them back into the rope to create a splice. The fids come in different sizes and shapes to accommodate different types of ropes and splicing techniques.

Rope splicing fids are typically used in combination with other tools, such as a marlinspike, to create various types of splices, such as a short splice, a long splice, or aback splice, depending on the specific application. The fids are designed to allow the user to easily manipulate the individual strands of a rope, making it possible to create a splice that is both secure and aesthetically pleasing.