These bevel-edged chisels are hardened and tempered under controlled conditions and accurately ground for precise control. Handles are square with rounded corners for comfort and to prevent rolling. Chisel handles are made of indestructible polypropylene to withstand heavy mallet and hammer blows. Overall lengths 9-3/4″-11″, blade lengths 3-1/2″ to 4-1/4″. These tools are factory ground and require honing before use. 4-piece set includes 1/4″, 1/2″, 3/4″ and 1″ widths.