Heavy DutyNEW CYLINDER ENGINE HONE KIT 3-1/2″ To 6-1/2″ (88 To 165mm) HONING MACHINE WITH4 SETS OF MULTI GRIT GREEN HONING STONES (VITRIFIED BOND)SPECIALLY MADE FOR HARDENED CYLINDERS 320 EXTRA FINE , 220 FINE + 180 MEDIUM + 120 COARSE & 1x Set Of Cured Wooden Blocks (For Polish & Mirror Finish)(Specially Cured To Absorb All Residue Of Abrasive Particles, Moisture and Oil) COMPLETE HONING MACHINE – HONE KIT SIZE – 3-1/2″ To 6-1/2″ (88 To 165mm) 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)1x Set Of Cured Wooden Blocks