78301 Shank Size: 3 P.G. Collet Size: #100 Proj.: 3 1/8 in O.A.L.: 6 13/16 in Diameter: 2 7/16 in Dim. D (min): 2 5/8 in Dim. D (max): 2 5/8 in Max. Dia.: N/A Nut: 76485 Backup Screw: N/A Wrench: 64888 A- Proj. B- O.A.L. C- Diameter D- Dim. D E- Max. Dia.