Whiteside DH20-57LH LH Hinge Boring Bit, 10mm SH X 20mm CD is a high-quality left hand hinge boring bit designed for precision and durability. This Forstner-style boring bit features a centering point and two straight carbide cutters that create ly flat and smooth bottomed holes. Additionally, it includes two carbide spurs to eliminate tear out, ensuring clean and accurate results. The shank has a flat side for secure installation, making it i for production use. Please note that this bit is specifically designed for use in a boring machine with left handed rotation only and is not suitable for use in a drill press or router. Manufactured by Whiteside Machine Company in Claremont, North Carolina, this bit measures 10mm shank size by 20mm cutting diameter with an overall length of 57mm. Model Number: DH20-57LH