STGCR 06-2 Turning Tool Holder ~ 0 degree lead angle. ~ 7° relief. ~ Shank is 3/8″. ~ Overall length is 2-1/2″. ~ Offset is 1/2″. ~ Screw is M2.5 X 6 #2100-0070. ~ Takes 1 TCMT 21.51 insert. 0 degree lead angle. 7° relief. Shank is 3/8″. Overall length is 2-1/2″. Offset is 1/2″.