NT30/NT40/NT50-ER25 ER32 ER40 Series

NT30 ---- : M12

NT40 ---- : M16

NT50 ---- : M24

Cutter diameter

Cutter diameter 50---inner diameter 22

Cutter diameter 63---inner diameter 22

Cutter diameter 80---inner diameter 22

Cutter diameter 100---inner diameter 32

Cutter diameter 125---inner diameter 40

The product is straight from the factory and the price is cheap.