Melt chocolate on medium setting in microwave for 5 to 10 minutes. Stir after 2 minutes, then after every 1 minute until smooth. Add pretzels and peanuts, blending well. Stir coating well. Spread on a lightly greased jelly roll pan. Refrigerate for 20 minutes or overnight. Lift hardened candy with a spatula and break into serving pieces. Store in an air tight canister.