Round Core Wire Advocates of round core wire argue that the wrap is tighter and vibration is more even and true. The most common core shape is hexagonal although other shapes may be used. Stringmakers who use hex shaped core wire do so because the corners of the core wire dig into the outer wrap, resulting in a greatly improved mechanical bond. The end result is a longer lasting, more durable string. Shaped core wire can be ordered from the wire mill, but some stringmakers choose to shape it on their own equipment.
Long scale is the most popular.
The scale is measured from the bridge to the fingerboard nut. Therefore string compositions for electric guitars must have highly magnetic characteristics. Magnetically responsive metals, such as stainless steel, nickel, and nickel alloys are used as wraps for electric strings. Acoustic string wraps, such as bronze, brass, and copper, cannot be sensed by the electro-magnetic pickup. The high carbon tinned steel used for the plain treble strings and also for the core wire, in both acoustic and electric strings, does have the necessary magnetic qualities.