3M 87449 Silver Depressed Center Grinding Wheel, T27 Quick Change, 9 in x 1/4 in x 5/8-11 Center Hub Thread, 7010409732, 20 per case 
Dynabrade 98273 - 1/2" Female Coupler with 1/2" Male Plug Assembly 
Insize 4801-16E, RADIUS GAGE, 17/64″-1/2″, 6928640330063
$26.25
Radius Gage Set Range 17/64″ to 1/2″
16 Internal Leaves and 16 External Leaves
Accuracy +/- .0014
Made of medium carbon steel
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