CarbideMax has 10x longer life than a bi-metal holesaw set. Highly versatile- can be used with a range of power tools including hand drills, Mag Drills and Pillar Drills. This Kit is a perfect power tool for fabricators and steel erectors. Can drill through heavy steel in locations that aren''t suitable for a mag drill. The extended length makes the TCT Hole Saw Set ideal for drilling into steel through existing holes into steel. Premium quality Tungsten Carbide Teeth has ultimate long life. Rated for steel, structural steels, stainless steel (inox), Aluminium, Cast Iron, Brass, Copper, Fibreglass, composite and sandwich materials, plastics, and wood. Use with the VersaDrive Magnet Drill adapter to convert to a broaching cutter. Use with the MultiSink tool to broach and Countersink in one operation. Ideal for drilling channel, box section and thick steel non-slip shank design with High strength. Use in any standard drill chuck or with a magnet drill adapter.