What is rig knife?

As an AI language model, I don't have personal opinions, but I can provide some information about a rig knife.

A rig knife is a specialized knife that is designed to be used onboard oil rigs and drilling platforms. These knives are commonly used by rig workers for cutting ropes, cables, wire, and other materials. They are often made from high-quality stainless steel or other durable materials to withstand harsh environments.

Rig knives typically feature a serrated blade that allows for easy cutting of thick ropes and cables. The serrations on the blade also help prevent slippage, which can be important when working in wet or oily conditions. The handle of a rig knife is usually made from a non-slip material, such as rubber or plastic, to provide a secure grip even when wet.

Some rig knives also come equipped with additional features, such as a marlin spike or shackle key. A marlin spike is a pointed tool that is used to work with ropes and lines, while a shackle key is used to tighten and loosen shackles or other hardware.

Overall, a rig knife is an essential tool for anyone working on an oil rig or offshore drilling platform. It allows workers to quickly and easily cut through materials while working in challenging environments.