Heavy Duty CYLINDER ENGINE HONE KIT 50 to 75 mm (2" to 3") HONING MACHINE WITH HONING STONES  COARSE 120, MEDIUM 180, FINE 220, Extra Fine 320 COMPLETE HONING MACHINE - HONE KIT SIZE – 50 to 75 mm (2" to 3") STONES – Coarse 120 (1 SET = 4 STONES) Medium 180 (1 SET = 4 STONES) Fine 220 (1 SET = 4 STONES) Super Fine 320 (1 SET = 4 STONES)