Our hinge boring bits come in 35mm x 57mm for stand-alone machines and 35mm x 70mm for CNC machines. We offer a high quality carbide tip, engineered to improve accuracy and efficiency in door and cabinet production. Precise, clean hinge cup holes are critical in professional cabinet making, and these bits deliver consistent results across high-cycle production runs. Ask about our chip-breaker version for use on HDPE and other plastic substrates.