... are ISO,A,AG,G,W,UN,NPT,ACME,API carbide internal & external threading insert SIZE RANGES ARE 11ER/16ER/22ER11IR ... ISO LDA In addition, we also can produce non-standard carbide threading inserts, CNC inserts and grooving inserts.The performance of ... insert can be as good as Tungaloy and Mitsubishi.Our carbide inserts sold very well in domestic market and Euro market ...