Chutney blades usually have 2 pronged edges and are ideal not only for making chutney, but also for powdering smaller quantities of spices.
Wet grinding blades in the largest mixing grinder jar are designed to create a strong vortex to draw ingredients. They typically have a wave or W shape and work well for idli-dosa batter, curry paste, milkshakes, and smoothies.
Dry Grinding blades are almost similar to wet grinding blades considering these are often found in multi-purpose jars. They are ideal for powdering larger quantities of spices like garam masala, turmeric, pepper etc.
Pounding blades have blunt edges which is useful for grinding dry spices to a coarse consistency.
Chopping blades can be used in the wet grinding or multipurpose jar, depending on which one has a removable blade. They're perfect for mincing meat and chopping onions, carrots, and cucumbers into coarse consistency.
Whisking blades can be attached to the wet grinding jar and can be used for whisking buttermilk, whipping cream and egg whites. But the blade lies a bit away from the bottom. So, you may have to pour at least 2-3 egg whites so that the blade touches the egg white.
Blending blades are predominantly found in juicer jars of mixer grinders or in personal blenders. They have 4 or 6 prongs edges which enable them to blend fruit pieces and other ingredients into a smooth consistency.
Extraction blades are used to grind fruits and vegetables to a super smooth consistency to extract the juice from them. This juice is then passed through a cylindrical sieve that surrounds the blade- hence separating the juice from the pulp.
Kneading blade is part of the food processing unit in many mixer grinders. They are made of plastic and are designed to knead dough. The design is almost uniform in all food processing units. Unfortunately, as they are made of plastic, many users complain about their durability.