Designed for template shaping such as Arched or cathedral doors, etc, #A-29-100, (D) diameter: 4, (D) bore: 1-1/4, (B) Cutting height: 1/2, (r) radius: 1/8, B1: 1/4, D1: 3-3/4, Description: 1/4 bead, optional rub collar: c-038, A-29-100 carbide Tipped 3-wing heavy-duty bead 1/8 radius x 4 dia. X 1/2 x 1/4 x 1-1/4 bore