... :2000 Hardness: 50--58 HRC PIN standard 1) American type sledge hammer: 4oz, 8oz, 12oz, 16oz, 20oz, ... , 25MM, 27MM2) Australian type Stone hammer: 1kg, 1.25kg, 1.5kg, 2kg German type stone hammer: 0.8kg, ... 1kg, 1.25kg, 1.5kg, 2kg Japanese type stone hammer: ... stone hammer: 1kg, 1.25kg, 1.5kg, 2kg3) German type Machinist hammer: 100g, 200g, 300g, 400g, 500g, 600g ...