BHA Metal and Stainless Steel Thin Cut Off Wheels for Angle Grinders, 4” x .040” x 5/8” - 25 Pack

.040" thin cutoff discs like these are the next best thing to a laser for making fine, precision cuts in metal. There's nothing special about the BlackHawk brand shown here but they are a good example of the type of disc I rely on for making clean cuts with minimal collateral damage.