• Best For: Floor-prep crews who want a double-row turbo cup wheel on a 4" grinder with a 5/8"-11 threaded spindle.
• Highlight: The MK-504SG-2 puts two rows of turbo segments on a 4" (102mm) Supreme Grade cup wheel, the double-row counterpart to the single-row MK-504CG-1.
• Expert Note: Choose the SG-2 double row over the CG-1 single row at the same 4" size when you want that configuration; this listing is the 5/8"-11 nut mount, while 158690 is the 7/8"-5/8" arbor.