For Botox therapy and nerve block procedures.TECA MyoJect Luer Lock disposable hypodermic needles features and benefits:-30% sharper than Slip Fit. -Locked needle is more likely to be seepage free. -Specifically engineered for Botox Therapy and Nerve Block procedures. -Records EMG activity while allowing injection of medication. -Stainless steel hypodermic needle, ground to a consistently sharp point. -Coated with a low friction insulator for ease of insertion. -Connects with both Luer Lock and Slip Fit syringes. -Color-coded lead for easy identification.