General description This comprehensive drilling kit includes three high-performance drill bits with diameters of 30 mm, 40 mm, and 50 mm, along with matching SDS Plus chucks, precision tungsten carbide guide bits, and a robust 350 mm extension bar. It is specially designed to produce clean, accurate holes in various masonry applications. Technical specifications Drill Bit Diameters: 30 mm, 40 mm, 50 mm Extension Length: 350 mm Material: Tungsten carbide Usage Ideal for drilling through brick walls (solid and hollow), concrete block, red brick, aerated concrete, and lightweight masonry structures. Perfect for installing air conditioning pipes, ventilation systems, washing machine drains, and other domestic or building penetrations. Designed exclusively for masonry materials; never use on steel, tile, natural stone, or reinforced concrete. Carbide tips require adequate cooling; always use water when drilling to avoid overheating and premature wear. Other information