... Hardness: 50--58 HRC PIN standard 1) American type sledge hammer: 4oz, 8oz, 12oz, 16oz, 20oz, 24oz, 32oz, British type Claw ... ) Double faced smiths' hammer: 2lb, 2.5lb, 3lb, 4lb, 6lb, 8lb, 10lb, 12lb, 14lb, 16lb, 18lb, 20lb7) Mason's hammer: 570g8) European type ... roofing hammer: 600g9) A613 axe: 500g, 600g, 700g, 800g, 1 ...