(1) 570-25R151.21-20-25 T-Max Q-Cut head for grooving with Q-Cut -size 25 and like inserts (N151.2-250-5E). 2 RAG551.31-251214-30 T-Max Q-Cut head for grooving with Q-Cut -size 30 and like inserts (N151.3-300-30-4G).