DURABLE: This 4 piece go thru wood chisel set has hardened and tempered chrome vanadium steel blades and metal striking caps. EASY TO USE: With soft grip handles and blade guards, the have a useful bevel edge pattern. VERSATILE: The set includes sizes 6mm, 13mm, 19mm and 25mm and is ideal for many DIY woodworking applications. PLEASE NOTE: These products need to be sharpened before use.