https://www.mccoys.com/shop/p/8912107-052303-32/forney-72324-back-plate-for-7-in-and-larger-type-27-depressed-center-wheels
72324 Back Plate, For: 7 in and Larger Type 27 Depressed Center Wheels
Sku: 8912107-052303-32
$10.99
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Grinder Accessories :Forney Back Plate
Back plate for type 27 depressed center wheels mounts 7 in (177.8 mm) and larger type 27 depressed center wheels, without arbor, to 5/8-11 angle grinder shaft.
Suitable for
7 in and Larger Type 27 Depressed Center Wheels