Advantages: Accurate, precisely dimensioned through-holes and blind drill holes in virtually any kind of wood Precision drilling with centring point Two taper taps and two cutters for clean, tear-out-free cutting edges Composition of set: Wooden box with dia. 4, 5, 6, 6, 7, 8, 10, 12, 14, 16 mm Advice: Speed in hardwood and softwood: 1500–3000 rpm