4.5x 7 8premium high density oxide cutting wheel 60 grits
50 Pack - 4.5"x.040"x7/8" Quality Thin Cut Off Wheels Metal
This is a 4.5" cutting wheel that is as accurate as you are and if you need it to be more accurate use a plasma cutter, band saw, Dremel, or chop saw with a metal cutting blade. I'm much more concerned with the disc coming apart then it being .12 thicker.
4.5"x.045x7/8" Pro Metal Steel & Stainless Steel Cutting
4.5"x.045x7/8" Pro Metal Steel & Stainless Steel Cutting Cutoff Wheel ... Flap Disc Grinding Wheel 40 Grit Type 29 ... x 7/8" Premium High Density Jumbo Zirconia Type ...