350mm Round Shank Concrete Drill Bit SDS Plus Concrete Saw Hole Cutter Cement Stone Wall Drill Bit with 30/40/50mm Expansion（Silver）

General descriptionThis 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 specificationsDrill Bit Diameters: 30 mm, 40 mm, 50 mmExtension Length: 350 mmMaterial: Tungsten carbideUsageIdeal 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