In a large bowl mix together pretzels, bagel chips, nuts, rice chex, corn chex and wheat chex.
In a liquid measuring cup whisk together melted butter, Worcestershire sauce, garlic powder, and salt. Drizzle butter mixture over dry ingredients and toss to coat.
Spread mixture on a large roasting pan and bake for 45, stirring every 15 minutes. Let cool and store in an airtight container. Can be frozen for up to 2 months.