HHIP S18S-SCLPR09 Style Indexable drill rod shaft is 18mm, minimum bore 22mm and total length 250mm. For CPMT09T304 inserts. Replacement screw is M4 x 8. Replacement Torx Wrench is a T-15 (#2100-0095). SCLPR right hand, screw held drill rod accepts positive 11 degree distance 80 degree carbide inserts.