The application of this bit crown profile is primarily for use on wide kerf, large diameter surface-set diamond core bits that are used to drill medium-hard, abrasive, unconsolidated formations. These crowns are normally set with larger sizes of natural drill diamond (>10 SPC). This bit crown profile is limited to core bits with a minimum outside set diameter of 4.70 inch (119.4 mm), a minimum inside set diameter of 2.10 inch (53.3 mm) and a minimum kerf width of 1.30 inch (33.0 mm).

The application of this bit crown profile is primarily for use on wide kerf, large diameter surface-set diamond core bits that are used to drill medium-hard, consolidated formations with relatively low compressive strengths. For large diameter core bits, this profile will yield better penetration rates and stabilization than other profiles and is recommended in place of the Stepped (Style ‘S’) profile where the kerf width exceeds 0.80 inch (20.3 mm). These crowns are normally set with larger sizes of natural drill diamond (>25 SPC). This bit crown profile is limited to core bits with a minimum outside set diameter of 3.30 inch (83.8 mm), a minimum inside set diameter of 2.10 inch (53.3 mm) and a minimum kerf width of 0.60 inch (15.2 mm).