This is a vintage wood shifter knob which was purchased in a box of tools at an estate sale. I do not know anything about these older parts but was told it was used as a shifter knob on a particular vehicle - do not know for sure which vehicle as the brand emblem is missing. The screw on part on the bottom looks to be in good shape and ready to be screwed on a shifter gear. Our local bolt & screw store in town said that a 7/16"-20 thread bolt fit in the base of the knob so hope this helps with what size this knob might fit. Please ask questions before bidding to avoid any problems with your order. If there is a problem with the item when you receive it, please let me know before giving me feedback as I will be happy to work with you on a solution. Thank you.