I offer this assessment with a certain amount of sorrow and I offer it on behalf of myself and the friend who I gave this item for Christmas last year. I actually liked the knock box in terms of function. But I'm unhappy with the company response when I attempted to purchase replacement rubber grommets that split after a short time. I was told to buy the entire knock box bar and that was my only recourse. I found this to be very poor customer support. You can't tell me they don't have the rubber grommets they could sell at a fraction of the cost. Plus I don't like scrapping a perfectly good piece of metal. Very not green.