Serious work knives are going to be fixed blades. Strength is something that can’t be sacrificed, and while many folders are incredibly rigid, they have mechanisms and moving parts that can and do become worn or damaged with hard use.
Modern folders are great knives. However, once mud, grit, sand and the unexpected rock an inch underground comes into play, they tend to fail. Few folders are strong enough long term for use as a trowel—fewer still can be safely batonned through wood. On the merit of ergonomics alone, the folder is usually slab-sided in profile and isn’t comfortable to hold for long periods, nor does it allow for easy cleaning. As such, the fixed blade is superior when the woodchips or dirt need to fly.
Defining work knives is merited by the individual task at hand. Some of the knives featured herein are not suitable to assume the role of another. Specialization is the name of the game and the knife you need for splitting wood is far different than one for working the ground. The main characteristic, across the board, is that these knives simply must hold up for their intended