Wicketkeeper Poynter and seamer McCarthy have signed to remain at Emirates Riverside until at least the end of 2018 .
Wicketkeeper Poynter broke into Durham 's Specsavers County Championship team this season .
Wicketkeeper Poynter , who broke into Durham 's Specsavers County Championship team this season , and seamer McCarthy have signed to remain at Emirates Riverside until at least the end of 2018 .