Features: Simple operation, easy to use, and fast perforated. Hard alloy forging, high temperature quenching, compatible with sharp edge and high hardness. The cutting is not easy to break, compatible with sharp and durable. The hard alloy head blade has the characteristics of high hardness, strong impact resistance and fast drilling speed. Center positioning: 130 degree drill point design, strong wear resistance, cutting sharper. Spesification: Name:Concrete Hole Saw Size:30mm 40mm 45mm 50mm 60mm 70mm 80mm 90mm 100mm Electric drill adapter:110mm ,200mm Shank:SDS round Widely application: This cement brick electric hammer drill bit widely used for cutting clean holes in concrete, brick and block work, drilling walls, stones, installation of air-conditioning, etc. Package: 1*hole saw or 1*Electric drill adapter Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data. 【Fast and Easy Perforation】With simple operation and easy use, this concrete hole saw allows for fast and efficient drilling. 【Durable and compatible with Sharp】Made of hard alloy and subjected to high-temperature quenching, this drill bit features a compatible with sharp and durable edge that is resistant to breakage. 【High-Speed Drilling】The hard alloy head blade ensures high hardness, strong impact resistance, and fast drilling speed. 【Precise Center Positioning】Designed with a 130-degree drill point, this hole saw offers strong wear resistance and sharper drilling.