Can drive four axes: four receptacles for A4988, DRV8825 or other StepStick compatible drivers.
Headers for XYZA steppers, XYZA end stops, spindle control, ESTOP.

Screw terminal block for power input.

Compatible with GRBL firmware.

This board uses CH340 USB-to-serial interface chip, instead of 16U2 (USB drives installed automatically under Windows 7/8).

Added 3 rows of holes for wiring.

Added 2 rows of holes for dupont style headers (headers are useful if you connect cables directly to Arduino board).

1 x CNC V3 Shield
1 x UNO R3 Arduino compatible board
4 x A4988 Stepper Drivers with heatsinks