CNC Digital Micro-Stepping Stepper Motor Driver, 2-Phase 1.0~4.2A 24V~48VDC for Nema 23 and 34 Stepper Motor, Replace M542/2M542

I have theese hooked to a Sainsmart 4 axis controller driving nema 23 steppers. Haven't had any issues.UPDATE: My review was for a stepper driver. Not this CNC. Not sure how they changed it to this product. I've never bought this and have no idea if it's a good product.

excelent product