A high quality wood and stainless steel Swedish fid that is perfect for splicing ropes with a tapered end to slide between strands, allowing the strands of the splicing rope to be moved underneath.
These types of fids are also effective for opening up hollow braid rope to make a brummel splice, moving the rope down the side before tightening it up again. Despite being a fairly basic tool, it's incredibly useful for anyone with any degree of knowledge of splicing - whether beginner or advanced.