Robin Hewitt on here used them on his mill with Nema 34 motors, with great success.

Few examples:
Zapp Automation Ltd - Stepper motors & Stepper Motor Drivers - Servo motors and Servo Motor Drivers - Ballscrews & linear motion products. : 2M2280N (High Voltage Stepper Driver) [2M2280N] - £176.40
Wholesale 220v stepper motor driver - Buy Low Price 220v stepper motor driver Lots on Aliexpress.com
2MA2278 Stepper Driver Pour CNC Fraiseuse 110V 220V AC 7.8A | eBay

They're not suitable for use with Nema 23/24 motors - the voltage is just too high.