Feature:1. EXCELLENT MATERIALS: Masonry hole saw kit is made of excellent cemented carbide that can help you drill clean holes quickly and last for years even in harsh conditions2. WIDE RANGE OF APPLICATIONS: Cement hole saws can easily drill through the most common wall materials such as stone, cement, brick, adobe, etc., which is the ideal tool for opening holes when you install air conditioners, water pipes, exhaust pipes, and water heaters3. WIDE COMPATIBILITY: The hole saw work with any electric hammer drill that accept the tool holder, making your hammer drill more useful than ever before4. EFFICIENT AND FAST: The concrete hole saw has an incisive alloy head, 135 grinding angle, easy to cut into the wall. Achieve fast drilling and improve work efficiency5. QUICK CLEANING: The concrete hole saw bit sharpness of three bladed teeth and chip extraction hole design allow you to quickly remove internal and external scratches as you drill, faster and more efficientlySpecification:Item Type: Concrete Hole Saw KitMaterial: Hard alloyOpening Diameter: Approx. 30mm / 1.18in40mm / 1.57in65mm / 2.56in80mm / 3.15in100mm / 3.94inOpening Depth: Approx. 50mm / 2inShank Length(without core drill): Approx. 300mm / 11.81in.Package List:5 x Hole Saw Drill2 x Connecting Rod2 x Core Drill2 x Screw1 x Storage Box(random color)Note:Please allow tiny size error due to manual measurement. Thanks for your understanding.