MSI Promax, WWA79420, 20-piece sanding bands and drum kit, Includes - 4 rubber drum sized; 1/2", 3/4", 1" and 1-1/4" and 16 replacement sanding bands Prom ax, WWA79420 20-piece sanding bands and drum kit Includes - 4 rubber drum sized; 1/2", 3/4", 1" and 1-1/4" 16 replacement sanding bands 2 sets of 120 grit and 2 sets of 90 grit 1/2" drum uses a 1/8" spindle; 3/4", 1" and 1-1/4" drums uses a 1/4" spindle