The “Ergonomic Grip” is, just as its name suggests, a weapon mod for melee weapons themed around the ergonomic optimization of your grip. Internally it is also set up for the melee weapon slot, and the basic intended use is to install it in swing-to-fight weapons like spears, clubs, machetes, and axes.
Generally, this type of grip mod is a part that contributes toward reducing stamina consumption and improving swing handling (ease of use). In melee combat, your survival rate changes far more based on “whether you can keep attacking without running out of breath” than on “the power of a single hit,” so its strength is that you can readily feel its effect during consecutive fights, Blood Moon nights, and mining.
The standard route to obtain it is to read the schematic so you can craft it. The schematic may come through a trader’s stock, various containers, rewards, and so on, so if you spot one it’s reassuring to secure it early. After crafting it, make sure your weapon has an open mod slot before installing it.
As for where to use it, start by putting one on the trusty melee weapon you keep swinging as your main. The benefit is greatest during the early-to-mid game when stamina management is tough, and when combined with food and drinks from the food or mining lines, you can hold the front line for even longer. Another easy-to-handle point is that its role doesn’t tend to conflict with other damage-type or status-effect mods.
*Since the effect amount and slot conditions can vary by version and weapon type, we recommend making a final check via the tooltip on the installation screen.