Designed for template shaping such as Arched or cathedral doors, etc. Features a ball bearing center with a steel sleeve and is available with either 1/2," 3/4" And 1-1/4" Inside diameter, #SC587, (D) diameter: 2-13/32, (D) bore: 1/2 & 3/4, (a°) angle: 18.6°, (b) Cutting height: 1, c: 3/8, Description: beveled reversible stile & rail shaper Cutter, l: 3/8, T: 1/4, replacement ball bearing: 47757 (42mm x 3/4 x 9mm)sc587 carbide Tipped 3-wing beveled reversible stile & rail 2-13/32 DIA x 1 x 1/2 & 3/4 Bore For 1-inch material