Folding Blade: Compact, safer to carry and improved dependability with locking blade.
One-Handed opening: Has a thumb stud, blade hole or other feature to facilitate one hand opening of the blade. Some models are one-handed opening and closing.
Gutting/Skinning Blade: For field dressing game.
Thick Blade: For heavy duty tasks.
Lightweight: Use of composite or other materials to minimize weight.