the second picture looks a little overexposed while the third, fourth and fifth pictures look a little underexposed. the background should look exactly the same in each picture (given they are all shot against the same background with the same lighting.)
by and large, you've done a reasonable job of controlling the reflections. the second pic had a few hard highlights on the sheath that look a little sub-par.
i'd suggest trying to use some reflectors (pieces of white cardboard will do the job) to bounce a little more light into the shadows.
depth of field is a personal decision. for pics like four and seven, you need to decide if you just want the one area in focus or if you want the whole picture to be sharp.
in the final picture, the hard highlight on the bevel is a little overpowering. perhaps adjust the lighting a little.
by and large, these are a pretty good effort.
please note that i'm a professional photographer, so i tend to get a little on the super-picky side when critiquing photos. none of these are obviously "bad", just some minor tweaking and practice is all that is needed for you to get them up to Top-Notch status.