Stepper drivers capable of driving up to 2.5A per coil, with adjustable current and up to 32x microstepping.
DRV8825 drivers give you a nice performance edge over the more common A4988 drivers with cooler operation, higher maximum current, and the ability to drive larger motors. They also seem to produce less noise or stepper motor "whine" than the A4988 Drivers.
These come complete with a little self adhesive heatsink so you can keep them cool in operation.
Dimentions of board: 15mm x 20mm
Number of pins: 16