Par Aide® 1009-01 Inside Sharpened Replacement Blade for HiO® Hole Cutter. The art of hole cutting taken up a notch. The best pound-in hole cutter on the market, the HiO™ Hole Cutter, offered exclusively by Par Aide®. Superintendents everywhere have been won over by its precision, ease-of-use and time and body-saving ability. To operate, simply pull out the pin, lift the handle, and the hammer action drives it into the ground.