Wow! It has a regular auger at the tip. Then there are 2 gear driven wheels with chain saw teeth! The only example we have ever seen! Nine inches long. Looks like a 1 morse taper.
Amazing! Patented? 15/16 inch Square Hole Mortise Bit – 88910U
Original price was: $78.00.$39.32Current price is: $39.32.
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![[4270-021] Polishing Wheel for WEN 4270](https://www.goodsolidhardwaredepot.com/wp-content/uploads/2026/10/4270-021-polishing-wheel-wen-4270.webp)
