... :2000 Hardness: 50--58 HRC PIN standard 1) American type sledge hammer: 4oz, 8oz, 12oz, 16oz, 20oz, ... 5kg, 2kg German type stone hammer: 0.8kg, 1kg, 1.25kg, 1.5kg, 2kg Japanese type stone hammer: 1kg ... , 1.25kg, 1.5kg, 2kg American type stone hammer: 0.8kg ... 16lb, 18lb, 20lb7) Mason's hammer: 570g8) European type roofing hammer: 600g9) A613 axe: 500g, 600g, 700g, ...