Amana tool 55140 Carbide Tipped Shankless Counterbore with Slow Spiral #20 Screw 5/8 D x 5/16 Dril D x 5/16 Dril SHK

Carbide Tipped 82° Shankless Counterbore With Slow Spiral (HSS) M2 DIN 338 Fully Ground Drill Bit Available in a wide variety of sizes. Carbide-tipped for long lasting results.Excellent for Drilling:Natural WoodsMan-Made BoardsMDFChipboardPlywoodAluminum/Non-Ferrous*Aluminum Composite Materials (ACM)*CompositesComposite 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.