The FEIN 63127329010 TCT Ultra 50 core bit is a 65 mm carbide-tipped core drill designed for demanding continuous use, with a 50 mm cutting depth and 3/4 in Weldon holder. The extra-durable HM construction is extremely wear-resistant, has a Vickers hardness of 1,450 HV and provides heat resistance up to 800°C for reliable drilling in demanding metalworking applications.