A 19th Century Brass Scarificator Used As A Bloodletting Instrument. This is a decorated type phlebotomy scarificator with 12 sharp steel blades. Pulling the trigger lever at the bottom stretches a spring and "cocks" the blades. The knob on the side releases them promptly making the skin cuts to allow blood draining. The depth of cuts is adjusted with the knurled screw. This instrument was used during the 19th century for medical phlebotomy. It is made of brass and steel (with some rust stains) and is fully functional.