Professional Ball Brush Hone (320 Grit) – For Engine Rebuilding Premium cylinder hone for removing glaze, creating crosshatch patterns, and prepping bores for new pistons & rings. Ideal for modern and classic engines. Specs: Material: Silicon carbide Grit: 320 (Fine finish) Use: Pros & Skilled DIY Sizes: Large (90mm+): 110mm • 105mm • 96mm • 91mm Medium (60-90mm): 85mm • 80mm • 77mm • 68mm Small (<60mm): Contact us Choose Size: Select a hone 1-6mm larger than your bore. Large: +3-6mm Medium: +2-4mm Small: +1-3mm Notes: Use honing oil only Clean with solvent, then soap/water, then ATF Verify size with your engine specs Includes: 1x Ball Brush Hone (selected size).