This set of 3 KWB step milling cutters contains 2 cutters in sizes 4 to 12 mm and 4 to 30 mm, plus a 6 mm diameter countersink bit. These features enable you to make holes of different sizes without having to change cutters. You'll be able to make high-quality holes in sheet steel, non-ferrous metals and plastics. Advantages : Suitable for making long holes or expanding holes Titanium drills for optimum durability One-piece moulding to avoid brittleness of the shank Can be used without pre-drilling For burr-free holes Features : Diameters: 4 to 12 mm, 4 to 30 mm and 6 mm Order no. 514100 Packaging: Set of 3 KW step milling cuttersDelivered in original packaging.