This FatMax chisel is made with hardened, tempered high chrome carbon alloy steel blades for edge retention. It is 50 percent stronger than Stanley wood chisels. It is constructed with a steel thru tang shaft and a steel striking cap for use with steel headed hammers. Hardened and tempered high chrome carbon alloy steel blade for edge retentionBlade edged honed, ready for useDescriptive etch mark displaying blade sizesPrecision ground blade for accurate sizesPatented, ergonomically designed, break resistant, bi-material grip handleSteel striking cap for use with steel headed hammer3/4 in.18 mm size