Description: STABILITY: The Folding Propeller Clip is stable in use and increases flight speed smoothly. CNC: CNC machining, high strength, reduce vibration, reduce noise. EASY INSTALLATION: The Folding Propeller Clip Set is easy to install, strong and has a low moment of inertia. APPLICATION: Folding Propeller Clip Clamp suitable for CW/CCW folding propeller. Folding with propeller is easy to store; INSTALLATION NOTE: When fixing, do not fix it too tightly or too loosely. It is better to shake it slightly. After fixing, manually unfold the propeller before the motor rotates. Specification: Material: Metal Size Chart: 5mm: LxWxThickness: 43.4x11.8x9mm/1.71x0.46x0.35inch Screw Hole Diameter: 3mm/0.12inch Inner Space of Pulp Clip: 8.24mm/0.32inch Center Hole Diameter: 6mm/0.24inch Adjusting Rings Hole Diameter: 5mm/0.20inch 6mm: LxWxThickness: 43.4x11.8x9mm/1.71x0.46x0.35inch Screw Hole Diameter: 3mm/0.12inch Inner Space of Pulp Clip: 8.24mm/0.32inch Center Hole Diameter: 6mm/0.24inch 8mm: LxWxThickness: 53.4x11.8x9mm Screw Hole Diameter: 3mm/0.12inch Inner Space of Pulp Clip: 8.24mm/0.32inch Center Hole Diameter: 8mm/0.31inch Package Includes: Optional: 5mm: 1x RC Folding Propeller Clip 1x Adjustment Rings 6mm: 1x RC Folding Propeller Clip 8mm: 1x RC Folding Propeller Clip Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful online shopping!