CTA Tools 2032 Heavy Duty Professional Piston Groove Cleaner Heavy-Duty Model Removes Carbon from Ring Grooves on Pistons For Use on Pistons from 2.5-Inches to 5-Inches or 65-Millimeters to 127-Millimeters Special Design Controls Depth of Cut and Blade Alignment Slide Flanges Allow Use on Slotted Pistons Cutter Wheel Sizes: 1/16-Inches, 5/64-Inches, 3/32-Inches, 1/8-Inches and 3/16-Inches