Feature:1. [Universal Thread] This coring bit has 5/811 universal thread, which can be assembled easily and quickly, suitable for various equipments.2. [Diamond Grit] The hardness of diamond abrasive grains is high, which can ensure a longer core life of the drill bit and quick hole opening.3. [2 Drilling Patterns] Coring drills can be used for both dry and wet drilling, with a dual purpose to deal with different working conditions.4. [Fast Drilling Speed] Our core bits have the characteristics of high hardness and high impact resistance, and the drilling speed is very fast.5. [Wide Application] The core drill can be used to drill concrete, red brick and marble under the conditions of installing air conditioners, pipelines, highways and airports.Specification:Item Type: Diamond Core Drill BitMaterial: Alloy steel and diamondLength: Approx. 440mm / 17.3inThreaded Interface: 5/8-11Diameter: Approx. 8in / 202mm.Package List:1 x Diamond Core Drill Bit1 x Saw Blade1 x GasketNote:Manual measurement, based on the actual size