Heavy Duty NEW CYLINDER ENGINE HONE KIT  34 to 60 mm HONING MACHINE  WITH DIAMOND HONING STONES GRIT - SUPER FINE 320 + 4 SETS OF MULTI GRIT HONING STONES  320 EXTRA FINE , 220 FINE + 180 MEDIUM + 120 COARSE COMPLETE HONING MACHINE - HONE KIT SIZE – 34mm to 60mm 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)