I've seen two of your knives with the same backdrop. Mind you, the wood you're putting them on, IS busy and attracts a little attention away from the knives, BUT, that's not the real problem, the problem for me is that fence in the background.
Find a spot on the wood lower down, balance the knife there and shoot and if you can't get the fence out of there because of the angle of the lens, just crop it in some software.
Basically, it should look like the second picture. No fence to draw your attention to...