This listing is for a Jet 12 inch Drill Press Depth Adjustment Collar including screw & nut.
All of these are obsolete parts that come in this replacement kit.
The collar fits the quill above the chuck see pictures.
To remove your broken collar, remove the chuck and undo the slide with the depth gauge. Slip the old one off and replace the new one. Insert and tighten the depth gauge, then secure the collar flush and tighten locking screw.
Now you will be able to accurately drill the same depth holes in your work piece.
