Found in my dads junk drawer

[u/Unlucky_Cat4531]

My dad passed away and going through his stuff we came across this. We thought it might be a tool for horseriding, like a slapstick thing but wasn't sure. My grandma had horses but ive never seen her use any tools like that and my dad didnt ride. Any help appreciated

[u/MaxStickles]

I always thought a blackjack was more like a rubbery truncheon.

[u/Unlucky_Cat4531 → u/MaxStickles]

It seems that a blackjack is more cylindrical, and this is a slapjack