I bought this to replace a bent tuning peg on a Warwick Corvette I bought secondhand. The bend wasn't allowing the nut to seat correctly, and wouldn't tighten up properly.
The replacement is exactly the same, except for the threaded nut section. On the original part, the thread had a milled flat section on it, the new part doesn't have this, but is a continuous thread. This gives a more positive, smoother threading action, and the thread itself doesn't have the 'rough' feel when hand-tightening it that the original had.
I went and replaced all four tuning heads, as another user gave feedback mentioning a better build quality - which I would go along with after comparing the original & new parts.