Eklind L-Keys are produced from the highest quality Elkind Alloy Steel. They are heat treated for maximum strength and finished to resist rust. Eklind's superior quality provides maximum torque and prevents rounding out of the key or hex socket. The Eklind 10609, Hex-L Key Metric Long Arm 9-Piece set is contained in a convenient compact molded holder that firmly retains each key in designated holes. The molded holder is color-coded, which makes it instantly identifiable