It's an upgraded version of the standard A4988 stepper driver module from Pololu.
The standard A4988 stepper motor driver from Pololu is an excellent design, and is hugely popular in the DIY community (especially in 3D printers). Pololu saw that they could improve on the standard design by making it exactly the same, but on a better circuit board that dissipates the heat better, so you can have more power out of exactly the same electronics.
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Warning: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.
Please visit www.P65Warnings.ca.gov for more information. This item was manufactured prior to August 31, 2018.