Tarot Anti Quick Release Paddle Seat / Black TL68B36 for RC Helicopter Using 6061T6 Aluminum Full CNC Machining, Suitable For Motor Shaft Is Less Than 4MM, And The M3 Mounting Hole Is 12mm Section Motors.When Using The Positive Quick Release Paddle Holder ,Counterclockwise To Loosen, While Clockwise To Install Tight, Easy And Convenient For Using, With Only Lightly Tighten. QR Paddle Theravada  1 (19.5  11.5MM) 2.5g QR Paddle Bottom  1 (18  7MM) 1.2g M3  6MM Round Head Screws 0.4g  2 M3  5MM Round Head Screws 0.4g  4