A cutter for a drill bit , comprising: a substrate for mounting the cutter to the drill bit ; and a cutting table made from a superhard material, mounted to the substrate , having an interface with the substrate at a lower end thereof, and having a working face at an upper end thereof, the working face having: a protruding center section ; a plurality of protruding ribs (46a-c), wherein: each rib (46a-c) extends radially outward from the center section to a side of the cutting table , and each rib (46a-c) has a triangular profile formed by a pair of inclined side surfaces and a ridge connecting opposing ends of the side surfaces ; and a plurality of recessed bases (47a-c) located between adjacent ribs (46a-c) and each extending inward from the side , characterized in that : an upper end of the substrate forming part of the interface has a planar outer rim , an inner mound for each rib (46a-c), and a shoulder connecting the outer rim and each inner mound, a shape and location of the mounds corresponds to a shape and location of the ribs (46a-c) and a shape and location of the outer rim corresponds to a shape and location of the bases (47a-c) except that the mounds do not extend to a side of the substrate. a substrate for mounting the cutter to the drill bit ; and a cutting table made from a superhard material, mounted to the substrate , having an interface with the substrate at a lower end thereof, and having a working face at an upper end thereof, the working face having: a protruding center section ; a plurality of protruding ribs (46a-c), wherein: each rib (46a-c) extends radially outward from the center section to a side of the cutting table , and each rib (46a-c) has a triangular profile formed by a pair of inclined side surfaces and a ridge connecting opposing ends of the side surfaces ; and a plurality of recessed bases (47a-c) located between adjacent ribs (46a-c) and each extending inward from the side , a protruding center section ; a plurality of protruding ribs (46a-c), wherein: each rib (46a-c) extends radially outward from the center section to a side of the cutting table , and each rib (46a-c) has a triangular profile formed by a pair of inclined side surfaces and a ridge connecting opposing ends of the side surfaces ; and each rib (46a-c) extends radially outward from the center section to a side of the cutting table , and each rib (46a-c) has a triangular profile formed by a pair of inclined side surfaces and a ridge connecting opposing ends of the side surfaces ; and a plurality of recessed bases (47a-c) located between adjacent ribs (46a-c) and each extending inward from the side , characterized in that : an upper end of the substrate forming part of the interface has a planar outer rim , an inner mound for each rib (46a-c), and a shoulder connecting the outer rim and each inner mound, a shape and location of the mounds corresponds to a shape and location of the ribs (46a-c) and a shape and location of the outer rim corresponds to a shape and location of the bases (47a-c) except that the mounds do not extend to a side of the substrate. an upper end of the substrate forming part of the interface has a planar outer rim , an inner mound for each rib (46a-c), and a shoulder connecting the outer rim and each inner mound, a shape and location of the mounds corresponds to a shape and location of the ribs (46a-c) and a shape and location of the outer rim corresponds to a shape and location of the bases (47a-c) except that the mounds do not extend to a side of the substrate. <EOS>