2Pcs V3 Engraver 3D A4988 Driver Cnc Shield Expansion Board For Arduino Ic Ne rg
2Pcs For Arduino V3 Engraver 3D A4988 Driver Cnc Shield Expansion Board New Ic. It is a total of four slots, can drive four A4988 stepper motor. In other words, six IO ports can be well managed three stepper motors.