RST RTR4036 Multi Mixer 4" The RST RTR4027 multi-mixer is perfect for mixing paint and other light materials. It is suitable for use with a 1/2" drill chuck and is effective with containers up to 5 gallons. Features: For mixing up concrete, mortar,paint and other light materials 100mm blade Effective with up to 5 gallon (19 litre) containers Fits 1/2" drill chuck Specification: Size: 4" / 100mm