Features: You can hold the appliance by the handle with one hand, leaving the other hand free to hold the bowl, if necessary. While you process the preparation, we recommend that you move the whisk around in the bowl, in order to ensure that the mixture is completely homogeneous. We strongly advise you to keep the whisk from touching the sides of the bowl. For maximum efficiency, at least one-fifth of the whisk length should be immersed, But never immerse the whisk holder into the preparation. Note : The whisk is ONLY for various speed blenders. WK185 is only for 220W Blender. WK250 is both for 350W/500W Blender.