"Maker’s 46 Background
Maker's 46 BottleMaker’s 46 is Maker’s Mark Bourbon finished with French oak staves. Maker’s 46 is aged just like Makers Mark, but after six years it’s dump and then returned to the barrel with the staves. The staves are “seared” or heavily toasted and not charred. Treatment of the staves is called Profile 46, which is where we get the Maker’s 46 name. The goal here for Maker’s Mark was to make a unique product without negatively disrupting an already stressed Maker’s Mark inventory."
https://whiskeylately.com/bourbon/makers-46/