IT CAN BE USEFUL O CUT AND EVEN PIERCE. MOST EFFECTIVE. ITEMS USED ARE: A ROD FROM HYDRALIC CAR HOOD LIFT, AND CAR GLASS LIFT GEAR WHEEL (SEMI CIRCLE GEAR WHEEL). I USED ONLY SCRAP. VERY ECONOMY. EASY TO MAKE. STILL I HAVE TO FILE TO GET FINE SHARPNESS AND PAINT.
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