From the manufacturer
Ernie Ball Power Peg
The Ernie Ball Power Peg is the first of its kind self-contained motorized pegwinder that allows you to restring your instrument up to 70% faster than traditional manual pegwinders. The Power Peg is powered by 4 AA batteries (not included) featuring a proprietary universal peg head that fits virtually all bass, acoustic, and electric guitar tuning machines.
Universal Design
Fits all electric, bass, and acoustic instruments.
Improved Torque
Meets all tension requirements form a mandolin to a vintage bass.
Up to 70% Faster
70% faster than traditional manual pegwinders.


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