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 45118, Cartridge Roll Mandrel, 3/16 in x 1-1/2 in x 1/4 in, 7000045772
$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.

3M 26137, PPS Series 2.0 Adapter, Type S41, Trapezoidal Thread - QCC, 7100135947
Insize 4180-500, MAGNALIUM STRAIGHT EDGE, length 20", 6928640320545
Dynabrade 95675 1/4" Male Plug with 1/4" NPT Male Thread
3M 08301, Ultrapro Autobody Sealant, 08301, Tan, 5 oz Tube, 7100142901, 6 per case
Dynabrade 95677 1/4" Male Plug with 1/4" NPT Female Thread
Dynabrade 95684 1/4" Male Coupler
3M 87147, PSA Cloth Disc 777F, 5 x NH, 36 YF-weightt, 7010308524
3M 92570, Temflex Vinyl Electrical Tape 165, Brown, 3/4 in x 60 ft (19 mm x 18 m), 6 mil, 7100169191
Dynabrade 53270 7" (180 mm) Dia. Right-Angle Disc Sander
Dynabrade 11476 Dynabelter Abrasive Belt Tool, Heavy-Duty
3M 35124, Grippy Sanding Cloth Trial Kit, 7100230957
3M 71361, 641WY 1/4" X 24", 1200 Mesh Diamond Cloth Belt, 7010534916
Standard Abrasives 713159, Aluminum Oxide Handy Roll, P120 J-weight, 1-1/2 in x 50 yd, 7010290409
Dynabrade 95842 Dynabrade Air Lube 10W/NR, 1 Pint
Standard Abrasives 713297, Aluminum Oxide Handy Roll, P120 J-weight, 2 in x 50 yd, 7100031623
3M 19769, Utility Cloth Sheet 314D, 9 in x 11 in P150 J-weight, 7000000357
Dynabrade 11477 Dynabelter Abrasive Belt Tool, Heavy-Duty
Dynabrade 95843 Dynabrade Air Lube 10W/NR, 1 Gallon
Dynabrade 40610 Electric Dynafile II Abrasive Belt Tool
3M 77558, Cubitron II Hookit Cloth Disc 947A, 77558, 40+ to 120+, 6 in x NH, Die 600Z, 7100232737
3M 11137, Roloc Disc 361F, 50 YF-weight, TR, 1-1/2 in, Die R150S, 7000045094
Dynabrade 53533 Cone or Plug Grinder (Triple Extension)
3M 24049, Wetordry Cloth Disc 281W, P1000 YF-weight, 8 in x NH, Die 800JM, 7000045052 
