Propeller Guards. Features: Protect your propellers from damage during collisions. Tough and highly reliable, this set includes four pieces of Phantom 4 Pro (Obsidian Edition) Propeller Guards. Fully compatible with the Phantom 4 Pro (Obsidian Edition) series. Other features: A must-have addition for new pilots. Helps prevent propeller or aircraft damage. Perfect for when flying near other objects. Tough and highly reliable. Lightweight, easy to install. Adds additional element of safety.