Available from Amana Tool, the No Mar Stopper Adjustable Depth Carbide Tipped Countersink (#55227), a tool the company says every woodworker should own, features an adjustable, heavy-duty, revolving depth-stop with a strong thrust ball bearing for quick and easy adjustment of the countersink depth without scratching or burning surfaces. It also has an open space to allow for chip evacuation. Amana Tool says the user-friendly design enables control of the drill length and its replacement, without the need to disassemble the depth-stop. It enables users to drill a pilot hole and tapered countersink in one step. In addition, the adjustable depth-stop and independent stop collar prevent marking of the workpiece and perfect countersink depth control. The company adds the countersink is ideal for drilling wood, composite panels, plywood, aluminum/non-ferrous, aluminum composite material (ACM), and composite decking materials.