Foxnovo 4pcs Snap on/off Prop Guards Tool-Free Quick Mount Propeller Protector for DJI F450 / F550 Tool-free installation, mounting and unmounting only takes seconds. Simple installation, easy to put on and take off. To protect your props from bumping into trees, walls or other obstacles by accident. Color: White. Material: Plastic.Suitable for DJI F450 F550. Professional aerial aircraft accessories with best quality.