Repeatable drilling and countersinking in a single operation thanks to adjustable drilling and countersinking depth. Free-rotating depth stop prevents damage to the material surface. Individually adjustable countersinking depth for different screw heads. The drill bit can be replaced if necessary. The countersink brings speed to decking construction: it enables decking boards and substructure to be drilled and countersunk in just one step. It can be used flexibly thanks to the adjustable drilling depth and is extremely durable thanks to the long service life of the special drill bit. The countersink is compatible with the entire Festool Centrotec system for quick changes between applications.