Great pix! If you'd like to add a few lines about your photo equipment and set up.......
Oh, great knife, too! I have five Grips, four folders, one fixed.
Thanks, Doug, for the comments. I'll add a few lines about the set-up... but I don't know how helpful it will be, ultimately.
It's been years since I created these images. And I've got a half dozen cameras that I use (and many lenses), so I'm sorry I don't recall the particular camera nor lens.
But... that's not important anyway. It's not the camera or lens that makes the image, but the set-up, lighting, and who is operating the gear! I believe I had a small softbox to camera left, a reflector to camera right, and a small softbox above and behind the knife. Background was a sweep of white vinyl.
You could capture such an image with any recent production DSLR or even smaller camera, with quite a wide variety of lenses.
Many people mistakenly assume that if you know the camera and lens used, that will be able to re-create an image. The truth is that the camera and lens are verrry minor players. It's the user, first and foremost, who makes the image look as it does, through a wide variety of techniques and tools - which include post production processing on the computer. There are a great many aspects and elements that make an image look as it does. I have been a professional/commercial photographer for a lifetime... and I have employed all of the knowledge, skills, abilities, and equipment from a career in the business to create such images. It's a bit difficult to distill that all down into a single post in an internet thread.