Feature:1. [Universal Thread] This coring bit has a 5/811 universal thread and can be easily and quickly assembled to a standard fixed coring or hand held drill press. It also works on various devices.2. [High Drilling Performance] The core bits feature chip evacuation holes, highly regular serrations and a concentric shaft design for high drilling performance.3. [Alloy Steel Body] The main body of the diamond coring drill is alloy steel, which can ensure longer coring life of diamond abrasive grains.4. [2 Drilling Methods] The core drill can be used for dry and wet drilling to meet your work needs, and a small amount of water can cool the drill bit while drilling, extending its life.5. [Main Application] Core drills are designed to drill holes in installed air conditioners, plumbing, concrete, red brick, marble, and other materials.Specification:Item Type: Diamond Core Drill BitMaterial: Alloy steel and diamondLength: Approx. 240mm / 9.5inThreaded Interface: 5/8-11.Package List:1 x Diamond Core Drill Bit1 x Positioning Drill Bit1 x Hex Wrench1 x Saw Blade1 x GasketNote:Manual measurement, based on the actual size