Vidiem Mixie Vstar Evo has Self locking Jars which has Secure locking on operation.It Ensures proper mating of Couplers & seating of Jar.Dynamically Balances Blades-Prevents wear & tear of Bush.It has Vortex flow, Hardened, Ribbed, Stainless Steel Blades for tough grinding.Tri-Mate Couplers:Self-aligning,Secure Mating,High strength.It has Stylish Sturdy Handles.