MGFV325R15-50/80（no include inserts） S20R-SVXCL16 Question: What does the "K"

Question: What does the "K" signify in the MSBNL2020K12 part number profile

Best results when used with: SSKCR/L 09

"Which 16mm left-hand boring bar provides maximum structural rigidity and optimal chip clearance for precision micro-bore internal profiling with DCMT 0702 inserts

525mm/3/8" inscribed circle size)

MGFV325R15-50/80（no include inserts） S20R-SVXCL16 Question: What does the "K"BEYOND MGFV325R15 50 80 External Spring Steel Turning Tools MGFV325R15 50 80 MGFV325 MGFV325R15 50 80 CNC Lathe Cutter Holder Machine Metal Tools Package Include: 1pcs turning tool holder (not include insert) Specifications: UsageSpring Steel Turning Tools Model NumberMGFV325R15 50 80 Brand NameOYYU BEYOND Use Insert : MGMN300(Need purchase separately)