GREAT Functioning Almond Co. Ashburnham, Mass. model 40 86 geared chuck with #6 supreme key included. The straight shank measures about .584 diameter x 2" long. Chuck may have #3 Jacobs taper??? VOICE Phone replies ONLY. Being sold as is Seen - first come / first serve. Local Daytime pickup only-NO shipping or long holds. Only five dollars!