Tite-Fit roundwound nickel-plated electric guitar strings are designed to be a great all-around string available in a wide range of gauges. Based on a round core the construction techniques for the Tite-Fit electrics are very old. However the core wire and wrap wire in DR s are the latest most advanced and expensive metals available. Use Tite-Fit strings for flexibility tone and long life. These guitar strings sound great for rock blues heavy metal and jazz. Gauges 10-13-17-30-44-52.