Tool material, tool wear and machined hole quality evaluation at CFRP drilling Claudiu-Ioan Jugrestan, Marcel-Sabin Popa, Stefan Sattel, Adina-Elena Cotarga, Ovidiu-Virgil Veres and Camil-Octav Chetreanu Don MATEC Web Conf., 112 (2017) 01015 Published online: 03 July 2017 DOI: 10.1051/matecconf/201711201015