Tone character
Skinny Top Heavy Bottom splits gauges creatively — standard 10-46 top three strings paired with heavier 30-52 bottom three. The result: easy bending on the treble side with drop-tuning-friendly low end. Tonally a regular Slinky on top, Beefy Slinky on bottom. Made famous by Zakk Wylde who popularized the gauge for drop-D metal and hard rock.