Irwin Tools 43610ZR Hand Brace Solid T20 TORX/T25 TORX Center Auger Bits, 5/8" x 2-3/8" Hand Brace Solid Center Auger Bits Medium-fast screw point ideal for general wood boring applications Full-length heat treated bit guards against bending in heavy-duty applications and strengthens the twist where the greatest strain occurs Double spur, double cutter design leaves an extremely clean hole finish