Feature:1. 5 Diameter Hole Saw Bit: This concrete hole saw bit kit has 5 diameter hole saw bit, 30mm or 1.18in, 40mm or 1.57in, 65mm or 2.56in, 80mm or 3.15in, 100mm or 3.94in.2. Kit Contents: Suitable for different cutting diameters. The concrete hole saw bit kit also contains about 2 shanks and 2 drill bit.3. Connecting Shank: The concrete hole opener saw bit connecting shank is for SDS Plus and for SDS Maximum type. Widely compatible, great for daily use.4. Widely Used: Concrete hole saw bit makes it easy to drill through the most common wall materials such as cement, brick, concrete and stone. Widely used for drilling wall or installing pipes, water pipes, exhaust hoses, etc.5. Tungsten Steel and Cemented Carbide: This kit is made of durable tungsten steel and cemented carbide, strong enough to drill through hard stone and concrete. Each hole saw bit is equipped with an air vent, which can freely remove dust from the drilling process, effectively improving the drilling efficiency.Specification:Item Type: Concrete Hole Saw Bit KitMaterial: Tungsten steel, cemented carbideSize: Approx. 30mm or 1.18in, 40mm or 1.57in, 65mm or 2.56in, 80mm or 3.15in, 100mm or 3.94inShank Type: For SDS Plus and for SDS MaximumSuitable: For stone, concrete, brick, concrete wall.Package List:5 x Hole Saw Bit2 x Shank2 x Drill Bit 2 x Screw1 x Storage Box