@Gordon You can buy an Auger Bit 18 in. Long - For Wood, at Any Building Supply Store, Hardware, or On-Line. I use an 18in.x3/8 in. - You can get Larger Diameter, but the standard is 3/8 in. If you need a Longer Bit, you'll have to weld an Auger Bit to the End of a Steel Rod, Just be Sure it's Straight.
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