Description Grooving Boring Bar :- 40MM (MGIVL) INSERT SIZE : 2MM (MGMN 200) 3MM(MGMN300) 4MM(MGMN400) LHS Material: MGIVL grooving bars are made from materials like 40-42CrMo  Hardness: MGIVL grooving bars can have a hardness of HRC42-46  Accessories: MGIVL grooving bars can come with accessories like a screw, wrench, spring, clamp, and shim  Inserts: MGIVL  grooving bars can be used with inserts like MGMN