Comparison : Item # 421-48220, CGW 4 1/2 x 5/8-11 Standard Spiral Pattern Medium Back Up Pad without Nut
Item # 421-48221, CGW 5 x 5/8 11 Standard Spiral Pattern Medium Back Up Pad without Nut
Item # 421-48222, CGW 7 x 5/8 11 Standard Spiral Pattern Medium Back Up Pad without Nut
Item # 421-48239, CGW 9 x 5/8 11 Standard Spiral Pattern Medium Back Up Pad without Nut
Item # 421-49510, CGW 7 x 5/8 11 Standard Spiral Pattern Flexible Back Up Pad without Nut