This heavy duty Bluetec paint mixer is an electric mixer as its name suggests , these are used for mixing paint. it has a collet diameter of 13mm and a variable motor speed . which can go higher depending upon viscosity of the paint and usage. electric paint mixer can be used for domestic as well as professional jobs. this paint mixer matches paint almost exactly to the color that you want . weather you use a paint is mixed to match .. the color sample is processed through the filters and colors That do not match are reflected off of them. this create an accurate reading of the color.