These are the same irons found on the planes on this page. While you might not need a replacement iron for years to come, having a spare iron, already sharpened, can speed your work along when you would rather be planing than sharpening and honing.

Item # 210145 - Spare Iron 45mm
Item # 210150 - Spare Iron 50mm for A4 & A5
Item # 210160 - Spare Iron 60mm for A6 & A7
Item # 210166 - Spare Iron 66mm for A8
Item # 210920 - Spare Iron 9-1/2 Block Plane
Item # 210925 - Spare Iron A10 Bench Rebate
Item # 210930 - Spare Iron A78
Item # 210935 - Spare Iron A77