Pat the chicken wings dry using paper towels.
Apply a thin layer of mustard over each wing to act as a binder.
In a separate bowl, mix together salt, pepper, garlic powder, onion powder, smoked paprika, and chili powder.
Generously season the wings with the spice mixture.
Allow the wings to marinate for 15-20 minutes.
Preheat the smoker to 250 degrees F.
Add the hickory wood chunks to the smoker.
Place the wings in the smoker and let them smoke for 60-90 minutes or until they reach an internal temperature of 165 degrees F.
Once smoked, transfer the wings to a baking sheet.