Showing Slide 1 of 2 - Carousel. Made from high-carbon steel. After you get used to doing it, though, you can attach your drill bit to your drill press in only a few minutes. Read more about Mortise and Tenon Joinery. Ships to:.
High quality - these square hole drill bits made of high speed steel, through heat processing, with high hardness drill bits, and sharp-edged square chisel, long life Widely Used - Great for drilling square holes in wood with a mortising machine or a mortising attachment/5(31). Woodworking Square Drill Bits Set, HSS Wood Mortising Chisel Countersink Bits Woodworker Hole Saw Power Tool Kits 1/4, 5/16, 7/16, 1/2, 5/8-Inch, Set of 5 out of 5 stars $/5(39). Sep 11,  · Square hole drill bits are used with mortising machines and drill presses. They allow you to cut square holes into wood. Square hole drill bits consist of an auger-style bit housed in a hollow square with sharp chisel edges.

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