Used to countersink holes for the heads of screws in woods, plastic and non-ferrous materials. The 2-flute integral design ensures uniform and concentric results each and every time. Carbide tips provide chip free hole edges and lasts much longer than steel countersinks. Available in a wide variety of sizes, complete with the HSS M2 fully ground drill bit.Excellent for Drilling:Natural WoodsMan-Made BoardsMDFChipboardPlywoodAluminum/Non-FerrousAluminum Composite Materials (ACM)Composite Decking MaterialsWARNING!: For optimal results and extended tool life use lubricant or air cooling. Ensure the material is fixed and drill is stable while drilling. NOTE: 55227 No-Mar Depth-Stop is not interchangeable with 55264 & 55626