The body is made of alloyed steel, and the teeth are made of bimetallic HSS M3 steel, which is laser-welded. It is resistant to high temperatures and abrasion. The progressive tooth spacing ensures fast and precise drilling as well as very efficient chip removal. Ideal for drilling through holes for ventilation, sanitary and water pipes, sewage and drainage distributors, junction boxes, connection boxes, locks, halogen lighting, etc. Suitable for cutting holes in steel (including stainless steel), cast iron, wood and wood-based materials (e.g., particle board, laminate, fiberboard, plywood), aluminum and non-ferrous metals, plastics, acrylic glass, drywall, etc. Requires the use of an adapter and a centering drill. Technical specifications: Teeth: HSS M3, Cylinder: alloyed steel, number of teeth per inch TPI: 4-6, Diameter: 57 mm, Cutting depth: 40 mm, Weight: 150 g.