Kennametal® S2112 Clamp Screw, A16NER3, A20NER3, A24NER3, A28NER3 and A32NER3 Grooving Boring Bar Indexable Tool, Hardware Compatibility: CM72LP, CM72LP, CM72LP, CM72LP Clamp, SM420 Shim and SL344 Shim Screw, Insert Compatibility: N.4R and N.4L

Kennametal® Clamp Screw, Torx Plus® Drive, TP25 Drive, Button/Socket, A16NER3, A20NER3, A24NER3, A28NER3 and A32NER3 Grooving Boring Bar Indexable Tool, Hardware Compatibility: CM72LP, CM72LP, CM72LP, CM72LP Clamp, SM420 Shim and SL344 Shim Screw, Insert Compatibility: N.4R and N.4L, Tool Holder Compatibility: NSR164C, NSR164D, NSR204C, NSR204D, NSR244D, NSR244E, NSR854D, NSR864E, NSL164C, NSL204C, NSL204D, NSL204D, NSL244D, NSL244E and NSL164D Top Notch™ Threading Toolholder