What item have you been using on a daily basis for the longest amount of time?
Sometimes I will use something and realize I've owned it forever. It's a nice change in our throwaway reality. I think my personal record is a bicycle multi-tool I got for one of my first bikes, ~25 years ago. Still have it, still use it. When it comes to electronic devices I have a Panasonic mini Hi-Fi from ~2005. Never felt like changing it.
It's a hay rake design by some guy called Barnsley... Arts & Crafts movement. Plain oak top, 7'x3' ish, dovetail fit to oak hay rake frame which is wooden pinned together. The top has been abused over the years but being oak it just absorbs the abuse and turns it into character!
There is one in the same style in Cheltenham museum (UK) but mine is nicer. My cousin has its twin.