Place the desired amount of chocolate melts into a glass measuring cup. Microwave on high for 30 seconds, stir and microwave in 10 second increments, stirring after each until melted and smooth. Tilt the measuring cup to bring the chocolate to one side. Stick a pretzel rod into the chocolate, rolling to cover the top section. Hold until slightly set, roll in sprinkles if desired, and set on parchment to set completely.