Photo 1 of SYWAN Woodworking Square Hole Drill Bits with Adapter, 1/4, 5/16, 3/8, 2/5, 1/2, 9/16, 5/8 Wood Mortising Chisel Set Wood Square Hole Mortising Chisel Drill Bit for Mortising Machines

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Photo 1 of SYWAN Woodworking Square Hole Drill Bits with Adapter, 1/4, 5/16, 3/8, 2/5, 1/2, 9/16, 5/8 Wood Mortising Chisel Set Wood Square Hole Mortising Chisel Drill Bit for Mortising MachinesPhoto 2 of SYWAN Woodworking Square Hole Drill Bits with Adapter, 1/4, 5/16, 3/8, 2/5, 1/2, 9/16, 5/8 Wood Mortising Chisel Set Wood Square Hole Mortising Chisel Drill Bit for Mortising Machines