The shank of the mandrel must match the size of the power tool collet or drill chuck, and the pilot diameter must be compatible with the size of the cartridge roll.
3M 45117, Cartridge Roll Mandrel, 3/16 in x 1 in x 1/4 in, 7000148243
$4.23
Factory Stock, 7-10 Day Leadtime
3M Cartridge Roll Mandrel is a tool attachment that holds an abrasive cartridge roll (sold separately). Together, the mandrel and cartridge roll enable the user to grind or finish hard-to-reach areas of a workpiece, such as angles and curves. The mandrel attaches to a rotary tool such as a die grinder or drill, and comes in different sizes to fit a variety of cartridge roll sizes.

Dynabrade 53652 3/8"-24 Female 5/8"-11 Male, 1-1/2" Length
Dynabrade 18809 O-Ring
3M 71358, 641WY 1/4" X 24", 600 Mesh Diamond Cloth Belt, 7010534894
Dynabrade 02425 Housing Assembly for 53232, 6,000 RPM
Dynabrade 81243 2" W x 60" L Medium NWN Surface Conditioning Belt, 10/pack
Dynabrade 96109 Motor Tune-Up Kit
Dynabrade 01185 Vane Set (4pk)
Standard Abrasives 707947, A/O Straight Cartridge Roll, 1/2 in x 1-1/2 in x 1/8 in 40, 7100085874
Dynabrade 52206 .4 hp 7 Degree Offset Die Grinder, Front Exhaust, 30,000 RPM, 1/4" Collet
Dynabrade 53193 Gear
Dynabrade 78550 1-1/2"Dia. 2-Set, 8-32 Female Center Thread, 80 Grit, Dynacut A/O Overlap Slotted Disc, 100/pack 
