What is this

[CraftingStudio]

I got an Arduino kit the other day and I don't know what this part is, what it does, or its name. Can anyone help?

[LarryD]

This is a driver board used to power a stepping motor.

See:
http://arduino-info.wikispaces.com/StepperMotors

http://arduino-info.wikispaces.com/SmallSteppers

[MarkT]

An ULN2003 based driver for a 28BYJ48 small unipolar stepper.