Description
Snap a plain string mid-set and you know the drill: dig through spares, hope the gauge matches, get back to playing. This .018 RPS M-Steel single from Ernie Ball is exactly the kind of string you want sitting in your case for that moment. It’s built from specially tempered, tin plated high carbon steel wire, so it holds up to bending, aggressive picking, and general string abuse better than a basic plain string would.
The real trick is at the ball end. Ernie Ball wraps a patented steel wrap wire around the ball end twist on their RPS (Reinforced Plain String) design, which cuts down on the slipping and breaking that usually happens right at that stress point. Pair that with a nickel plated ball end made from high quality brass wire rod, and you get a string that locks in and stays there, tuning-wise, instead of drifting flat after every session.
Why it matters day to day:
- Specially tempered high carbon steel wire resists fatigue from constant bending and re-stringing
- Patented steel wrap wire at the ball end reduces slippage and breakage right where plain strings usually fail first
- Nickel plated brass ball end keeps a consistent, secure seat at the bridge or tailpiece
- Sold as a single .018 gauge, perfect for topping off a set or building your own custom gauge combo
If you’re the type who restrings often and hates losing tune on a fresh set, this single fills the gap fast without compromising on durability.





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