Anti-needle-stick safety device that incorporates a locking system with a 45º twist, providing security and preventing instability of the syringe during use. It allows for passive or active aspiration. Rechargeable system. Advantages: * Patented locking system: Secure locking of the needle protection system. Provides safety and ease of use. * Passive aspiration system: Safety for the patient. * Transparent anesthesia barrel: Clear visibility of aspiration. * Sliding protective sheath: Needle-stick protection. * First reversible retention position: Protection during treatment when performing multiple punctures. * Irreversible final locking position: Definitive lock to prevent needle-stick injuries.