Twin shaft mixers are available in multiple configurations depending on the process requirements. Coaxial configurations offer centre aligned dispersion shafts with scrapper blades of different configurations. Hybrid twin shaft mixers can be provided with off centered dispersion shafts and screw type shaft or scrapper shafts. The blade configurations can be single or double. The scrappers can be single arm, multi arm. These mixers offer improved dispersion and reduced process times.