CYLINDER ENGINE HONE KIT 2 1/2″- 5 1/2″ + 4 SET HONING STONES high quality. HONING STONES INCLUDES 4x COARSE 120, 4x MEDIUM 180, 4x FINE 220, 4x SUPERFINE 320 Heavy Duty CYLINDER ENGINE HONE KIT WITH HONING STONES COMPLETE HONING MACHINE – HONE KIT With HONING STONES4x COARSE 120, 4x MEDIUM 180, 4x FINE 220, 4x SUPERFINE 320