Nice shot. My two suggestions would be that the crop on the bottom seems just a tad bit close and I think the texture of the background detracts a bit but otherwise nicely done.
Nice job. I like the composition and the subject matter, but I think the surface it was placed on may be detracting from the main subject. There is almost too much texture in it.
Nice detail, I like the bit of color in an almost colorless subject. The texture of the jack in good, the background texture balances it without distracting. Wish for a greater DOF.
I like the textures in this shot. It wouldn't be as interesting without the texture of the table. Looking at the detail in the jack, I can totally remember the feeling of holding one of those things! Perhaps the DOF could have been a little larger (the back left ball looks a little soft) but other than that, nice job!
nice clean capture. I like the texture of the jack and the surface upon which it rests. It is very crowded in the frame though, at the top and bottom. You left better spacing on the left and right sides.