These Carbide Planer Blades are made of manganese steel, renowned for its high impact strength and resistance to abrasion in its hardened state. Each of these sharp blade fits well for cutting soft wood, hard wood, ply-wood board, and other types of wood. Details Material: Manganese Steel Length: 3-1/4 inch (82mm) Width: 2/9 inch (5.5mm) Thickness: 1/22 inch (1.1mm) Packaging: Plastic box (10pcs), Cardboard (2pcs) Compatible with: most of 3-1/4 inch (82mm) electric handheld wood planers (including MAKITA-BOSCH-B & D-HITACHI)