LionShark Woodworking Hole Saw Square Drill Bits

A combined chisel-and-auger design allows the LionShark Woodworking Hole Saw Square Drill Bit Set to cut defined mortises with clean corners and consistent depth. Each bit is crafted from high-speed steel and pairs a hollow square chisel with an internal spiral auger. As the auger removes material from the center, the outer chisel edges shape the walls of the cut, producing square openings suited for joinery work. The spiral design draws chips upward during operation, helping keep the cutting area clear and maintaining steady progress through the material. The set includes four sizes, 1/4", 5/16", 3/8", and 1/2", covering common mortise dimensions used in furniture, cabinetry, and frame construction. Designed for mortising machines, the bits can also be used with compatible drill press attachments for controlled vertical cutting. Their compact size allows them to store easily alongside other shop tools, making them a practical addition for projects that require repeatable, well-defined joinery.