Whiteside DH2057 Right Hand Hinge Boring Bit - 10mm SH X 20mm CD is a high-quality Forstner style boring bit designed for precision and durability. This production-grade bit features a centering point and two straight carbide cutters that create ly flat and smooth bottomed holes. Additionally, it has two carbide spurs to eliminate tearout, ensuring clean cuts every time. The 20mm diameter is i for installing European style cup hinges on cabinet doors. The shank includes a flat side for secure installation, enhancing stability during use. Please note, this bit is intended for use in a boring machine with right-handed rotation only and is not suitable for drill presses or routers. Manufactured by Whiteside Machine Company in Claremont, North Carolina, this bit combines quality craftsmanship with practical design to meet professional woodworking needs. Model Number: DH20-57