FITS ALL STANDARD CHUCKS: This 35mm TCT hinge cutter has an 8mm shank that fits all standard keyed or key-less chucks. DURABLE AND ACCURATE: With a tough, tungsten carbide tip, this concealed hinge drill provides accurate hinge drilling with centre point and outer spurs. NOTE: This product is intended for use in a hand held drill or pillar drill - it is NOT suitable for use in a router.