Perfect countersinks every time using the adjustable depth stop No-Mar Countersink bit. This is one of the most used tools in my shop because of the clean cut it leaves at the right depth for every single countersink without marring the surface of the material! Check out this countersink available on our website! -- Amana Tool Adjustable No-Mar Carbide Tipped Countersink bit Hex Shank, item no. 55227 | Toolstoday Router Bits and Saw Blades