Keeping Classics Pumping!
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WGP Autococker hammers in various conditions and styles.
Sheridan main springs are a smaller outer diameter than a nelson main spring and will generally be about the Outer diameter size of a screws head, about .25 inches.If your Autococker hammer uses nelson main springs then you need a nelson style hammer. Nelson springs are larger than the size of a screws head and have an Outer diameter size of about .50 inches.