Dual stepper motor driver shield can drive 2 bipolar stepper motors at the same time using an Arduino.
It can work with the power supply from 4.75V to 30V. High accuracy controlling can be supported by Arduino for CNC milling machine. It uses the same stepper motor driver chip as EasyDriver, so you can use it as 2 EasyDriver modules on one board. And there are all pins breakout as 3PIN electronic brick/sensor brick interface.
Datasheet of Dual stepper motor shield
Datasheet of A3976
Schematic of Dual stepper motor shield