Contents Insert Selection A1 ~ External Holders D1 ~ Grades B1 ~ Boring Bars E1 ~ Inserts C1 ~Negative TypeGrooving Holders Parting-Off Holders F1 ~ InsertsPositive Type C57 ~ Threading Holders F43 ~ Negative Positive 80° Diamond Type C18 C57 55° Diamond Type C25 C63 Round Type C66 Square Type C33 C67 60° Triangular Type C40 C70 35° Diamond Type C49 C80 80° Trigon Type C52 C84 CBN Inserts M1~ PCD Inserts M1~ Guidance N1 ~ 4