Preheat grill for medium- high heat. Combine meat with panko crumbs, masa flour, egg, Worcestershire sauce, salt, and pepper.
Form into 1 1/2 inch meatballs and thread 4-5 on each skewer. These will make quite a few meatballs, so you might need to cover and store remaining meatballs in refrigerator, as you will need to make these in batches. Place meatballs onto grill and cook for 10-12 minutes turning often. Once meatballs are through cooking, place onto tray and tent with foil. You can also keep them warm in the oven.