I purchased a Trophy Ridge sight from an online dealer. I was very unhappy with it when I received it, for a couple of reasons. First it wasn't what the dealer had pictured, second the wingnuts are useless. The dealer wasn't interested in "my" problem so I contacted Trophy Ridge. Not only did they send me the allen screws, but they sent me the sight that the dealer advertised at NO cost to me. While I'm still not sure I like the sight, Trophy Ridge did everything possible to straighten out the problem, and I thank them for it.