I like the subject, nice use of centered composition. Too much negative space in the top of the image IMO. Touch more DOF for the screw would make it more compelling.
I'll be curious to see if this was a point and shoot with limited DOF or a DSLR that would have been able to shoot this great composure with a f32. I likew ht eidea but the DOF is a bit more shallow than I would have enjoyed seeing