Syringe Luer Lock (without needle) - it is also called "twisting" because of the screw connector, which it is equipped with. Any Luer needle (Luer standard) is compatible with such syringes. Twist the needle - it will take half a second longer to place it then, but in this case, we are insured that the needle will fly off! Due to this, an expensive drug will not disappear, and the needle will not disconnect from the syringe if the patient moves.