Sunnysky X22 Prop Adapter Set with 6mm CW / CCW Threads. For X2208, X2212, X2216. Included: 4 - Sunnysky X22 Prop Adapters, 12 - screws, 4 -Hex Nuts and Washers, 1 - allen wrench CNC Machined from Billet Aluminum Use with plastic, carbon fiber, or DJI self tightening props with 6mm hub Very strong and light weight with a 6mm shaft For Sunnysky X2208, X2212, and X2216 Brushless Motors