Tribest Single-Serving Mason Jar Personal Blender, PB-350 S-Blade Mason Jar Attachment -Use the Mason Jar Attachment to blend and grind your recipes in glass mason jars.Works with most regular-mouth glass canning jars. Comes with Glass Mason Jars - For added storage and convenience. Perfect for baby foods, smoothies, shakes, salad dressings, sauces, grinding coffee beans, etc. The possibilities are endless! Blending &Grinding Blades - Completely enclosed during operation, making it impossible to come in contact with spinning blades. Advanced safety features prevent operation when the blades are not completely enclosed.The Grinder is a small and powerful blade that will freshly grind seeds, nuts, coffee beans or even flax seeds. Powerful 200-Watt Motor -Easily blends all your favorite ingredients including ice and grinds all your grains, nuts, and seeds. 2 Modes of Operation -One-touch pulse and press and twist continuous modes for blending and griding to that perfect consistency.