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.
F23 Fast Blackjack™ Econojet (2-pack)
Motor F23 Manufacturer Aerotech Type Single Use (Econojet) Flame Black Max™ (FJ) Quantity per pack 2 motors Diameter (mm) 29.0 Length (cm) 8.3 Ejection Delay (s) 4 or 7 Average Thrust (N) 18.6 Maximum Thrust (N) 29.8 Burn Time (s) 2.2 Total Impulse (Ns) 41.2 Total Mass (g) 82 Propellant Mass (g) 30