Tungsten carbide tipped version of the popular trend snappy drill countersink with adjustable hss drill this tool can be used in abrasive materials such as laminated chipboard the drills produce pilot holes only whats included1 x 20mm 564 drill countersink1 x 25mm 332 drill countersink1 x 275mm 764 drill countersink1 x 325mm 18 drill countersink1 x 35mm 964 drill countersink specifications shank diameter14 inch hex