Right hand MWLNR16126H08: length:4in, shank dia:0.63in (5/8"),with 1 piece WNMG431 Insert Right hand MGEHR1212-2: length:4in, shank dia:0.47in ,with 1 piece MGMN200 Insert Right hand SER1212H11: length:4in, shank dia:0.47in ,with 1 piece 11ER AG60 internal threading insert Right hand SDJCR1212H07/SDNCN1212H07: length:4in, shank dia:0.47in ,with 2 piece DCMT21.51 Inserts Right /left hand S12M-SCLCR/L : length:6in, shank dia:10.47in ,with 2 piece CCMT21.51 Inserts About the inserts Carbide with CVD coating Good wear resistance Smooth cutting Design for stainless steel .steel , Copper and aluminum 7pcs carbide inserts: 1pc 11ER internal threading insert/1pc WNMG431/1pc MGMN200/2pcs CCMT21.51/2pcs DCMT21.51