Amana tool 55476 Carbide Tipped Counterbore with No Burning and No Marring Adjustable Depth Stop with No-Thrust BB, 3/8 D x 5/32 Dril D x 3/8 Inch Round Shank

No Burning, No Marring & No Friction Counterbores Includes drill (slow spiral, High-Speed Steel (HSS) M2 fully ground drill bit).  This unique counterbore features an adjustable, heavy-duty, revolving depth-stop with a no-thrust ball bearing for quick and easy adjustment of the depth without scratching or burning surfaces. These tools combine Amana's well-known, long lasting carbide tipped counterbores with the unique, adjustable & heavy duty revolving depth-stoppers with a no-thrust ball bearing. No burning, marring or scratching of surfaces A must-have tool for every woodworker Adjustable, heavy-duty, revolving depth-stop HSS drill bit included Industrial quality, carbide-tipped  2-Wing With Amana's non-marring adjustable depth stop and no-thrust ball bearing, woodworkers can drill a pilot hole and tapered counterbore in one step. The adjustable depth-stop and independent stop collar prevent marking of the workpiece and perfect counterbore depth control. Each cutting edge is manufactured from an Amana-exclusive carbide grade designed to deliver the highest quality of cut, maximum cutting efficiency prolonged tool life. Excellent for Drilling: Natural Woods Man-Made Boards MDF Chipboard Plywood Aluminum/Non-Ferrous* Aluminum Composite Materials (ACM)* Composites Composite Decking Materials *WARNING!: For optimal results and extended tool life use lubricant or air cooling. Ensure the material is fixed and drill is stable while drilling.