Internally slotted rubber drum expands with centrifugal force to keep abrasive belts tight while grinding. Use with 3M(TM) Inline Sanders (PN28338 and PN28339) and 3M(TM) Match & Finish Sander (PN 28659) for generating straight line scratches for finishin
Expander Wheel has 1/4 in radius to eliminate edge cuts and a 1 in arbor hole. For use with 3-1/2 in x 15-1/2 in 3M(TM) Coated Abrasive belts and 3M(TM) Surface Conditioning belts. Requires #3 Wheel Adaptor Kit (PN45038) to mount to 3M(TM) Inline Sanders.