nice shot. can't tell if you used G blur or not - but good dof either way. looks like pool table felt or something. Interesting color, can't make up my mind if I would like another color or not. I think maybe black or red would make it more dramatic maybe - and say more about the cuffs, without saying anything at all - green doesn't invoke an emotion imo like red for blood or black for...well black can mean so much.... but that's just a thought. nice work.
Not sure I like how you've focused this picture. I think perhaps a black background may have been more effective as well, to bring out contrast. A nice composition otherwise though.
I like that you tried a different take then everybody else. Composition is very nice. The reflections, light, and shadows gives this handcuffs a lot of emphasize and bring it out of the background.
The focusing on the keys and blurring of the handcuffs looks really good and gives it an appealing depth of field.