Front-row duo Dean Greyling and Werner Kruger have agreed new three-year deals with the Bulls.
Greyling, 27, has played 30 times for the Super Rugby outfit, while fellow South Africa international prop Kruger has racked up 75 appearances.
And Bulls coach Frans Ludeke is delighted to have retained the services of the duo.
"It is no secret that high quality props are hard to keep in the country and to have two of them agreeing to an extension of three years at the same time is wonderful news, not only to the Vodacom Bulls, but also to South Africa," Ludeke told the club's official site.
"Both Werner and Dean have their best years in their positions still ahead of them and to know that they will be playing those in South Africa and more particularly Pretoria is awesome news for all concerned."