Dean Markley USA, Inc. manufactures and distributes, both domestically and internationally, a complete line of Acoustic, Electric, Bass, Banjo, Mandolin, Baja Sexto, Pedal Steel, and Classical musical instrument strings. Dean Markley USA is known worldwide for its quality and innovation. Our company developed and brought to market the highly profitable Blue Steel line and Helix lines of Acoustic, Electric and Bass Guitar Strings. Blue Steel is a processed string which is processed using Cryogenics. Helix is a hyperelliptically wound string.