General description 3 different sized wall hole saws (65mm, 50mm, 30mm) are designed for various cutting diameters, providing a complete choice for everyday use. Made of metal with an ultra-strong carbide tip, these bits are durable for years of use in tough conditions, ensuring uncompromising performance. High-frequency welding technology is employed for very strong weld openings, resulting in a smooth weld mouth inside and out. Technical specifications Sizes: 65mm, 50mm, 30mm Material: Metal with carbide tip Compatibility and accessories Compatible with any rotary hammer drill with SDS-Plus attachment Usage Excellent for drilling in concrete, stone, brick, cement, masonry, aerated block, cast iron block, and air conditioning systems If there is tile on one side of the wall, use a porcelain hole saw to drill the porcelain first, then use the wall hole saw to predrill the holes It is recommended that the porcelain hole saw be one size larger than the wall hole saws