These are the mandrels for holding cloth abrasive bands in your tool.
All these mandrels have a 1/4" shank.
There are two styles of mandrel listed below:
• Centrifugal Slotted Expander Wheels (Rubber Slotted Expander Wheels) — insert into the band, and then expand by centrifugal force to hold the band securely
• Nut-Tightened Rubber Expansion Wheels (Rubber Cushion Polishing Wheels) — insert into the band, and then are tightened with a central nut to expand and secure the band