Comparison : Item # US616290000, 4-1/2" x 1/4" x 7/8" - CA46U Type 27 M-Calibur Depressed Center Grinding Wheels
Item # US655290000, 4-1/2" x 1/4" x 5/8"-11 - CA46U Type 27 M-Calibur Depressed Center Grinding Wheels
Item # US616291000, 5" x 1/4" x 7/8" - CA46U Type 27 M-Calibur Depressed Center Grinding Wheels
Item # US655291000, 5" x 1/4" x 5/8"-11 - CA46U Type 27 M-Calibur Depressed Center Grinding Wheels
Item # US616292000, 6" x 1/4" x 7/8" - CA46U Type 27 M-Calibur Depressed Center Grinding Wheels