In a 1-qt. microwave-safe dish, combine the caramels, butter and milk. Microwave, uncovered, on high for 1-1/2 to 2 minutes or until caramels are melted, stirring once. Stir in the almonds, peanuts and pecans. Drop by tablespoonfuls onto waxed paper-lined baking sheets.
In a microwave-safe bowl, melt chocolate chips and shortening; stir until blended. Spoon over clusters. Refrigerate until set. Store in an airtight container in the refrigerator. Yield: 1-1/2 dozen.