Angle bung entry mixer can be applied for mixing in closed drums. Screw angle bracket into a 2 bung opening and fasten the set screw to the angle bracket after the mixer is placed into the drum. Special designed stainless steel blade will fit easily, blades extend by centrifugal force when operating and retracts when stopped. Mass (kg):1/4HP--4.5, 1/2HP--8 Shaft length: 840 mm Propeller type: c5 15cm.x2pcs Available horsepower: 1/8HP ,1/4HP ,1/2HP Optional choices : stainless shaft.