This is a 29mm diameter single use motor. It is ready to fly and doesn't need any motor hardware. You will still need a retaining system.
F20 White Lightning™ Econojet (2-pack)
Motor F20 Manufacturer Aerotech Type Single Use (Econojet) Flame White Lightning™ (W) Quantity per pack 2 motors Diameter (mm) 29.0 Length (cm) 8.3 Ejection Delay (s) 4 or 7 Average Thrust (N) 20.8 Maximum Thrust (N) 40.3 Burn Time (s) 2.5 Total Impulse (Ns) 51.8 Total Mass (g) 80 Propellant Mass (g) 30