DESC: Mr. Coffee Precision Coffee Grinders with Chamber Maid Cleaning System. 3 precision grind settings: fine; medium; coarse; exclusive chamber maid clears grounds from chamber walls; grinds 4-12 cups; removable grinding chamber for easy pouring; press and pour wide opening lid with integrated spout for easy filing and dispensing. OSTER Mr. Coffee IDS77 Electric Coffee Grinder with Chamber Maid Cleaning System Mr. Coffee Precision Coffee Grinders with Chamber Maid Cleaning System. 3 precision grind settings: fine; medium; coarse; exclusive chamber maid clears grounds from chamber walls; grinds 4-12 cups; removable grinding chamber for easy pouring; press and pour wide opening lid with integrated spout for easy filing and dispensing.