Lots of multi-tools could come in handy while fishing. Gerber's Linedriver was built specifically for it. The tool has two mission-specific ends: one that rotates to help tie knots and with a spike to help clear eyelets, and another that incorporates a split shot crimper, hook eyelet threader, and serrated scissor snips. A pocket clip with a rotating tether point keeps the tool secure and ready for use.