Requires clamping a plastic table bracket to your drill press column with a screw clamp like a radiator or dust hose clamp. My drill press is a Delta unit that has a crank to elevate the cast iron table and includes a steel rack for the elevating crank that swivels when the drill press table is rotated around the column. Use of this product locks the elevation rack and precludes swiveling the regular drill press table out of the way for tall work pieces. Used the product anyway as it appeared to be a useful accessory, but after a few weeks, the plastic table bracket holding bracket cracked and the table fell off the drill press column. Good product idea, less that perfect implementation.

They are very good quality. Just be sure you have the right sized t-track.

I bought several of these hold down clamps for my cross cut sled. So glad I did. Perfect for securing your material. It also doesn't hurt that when combined with the blue Rockler t-track it gives my sled a nice professional looking finish.

I have four sets of tracks ,for a few years now and I set them up on half of my 4 ft. x 8 ft. work bench. I use them to glue up boards with biscuts. I also made up boards 2 " wide 12" 36 " and 48 " long then I drilled holes in each end to fit the t bolts , they are oak and keep the boards flat as they dry. great tool with many uses,  fast shipping.