... :2000 Hardness: 50--58 HRC PIN standard 1) American type sledge hammer: 4oz, 8oz, 12oz, 16oz, 20oz, ... claw hammer: 21MM,23MM, 25MM, 27MM2) Australian type Stone hammer: 1kg, 1.25kg, 1.5kg, 2kg ... hammer: 1kg, 1.25kg, 1.5kg, 2kg3) German type Machinist hammer: 100g, 200g, 300g, 400g, 500g, 600g ... 16lb, 18lb, 20lb7) Mason's hammer: 570g8) European type roofing hammer: 600g9) A613 axe: 500g, 600g, 700g, ...