CPROSP Diamond Core Drill Bit 68 mm 1¼ Inch UNC Core Drill Bit L 420 mm for Drilling in Concrete, Reinforced Concrete, Masonry and Stone

• 【Compatible equipment】:Hand core drill and core drill. (Please note: do not use with electric hammer and hammer drill)
• Product parameters: diameter: 68 mm; total length: 420 mm; working length: 370 mm; teeth: 7; (please note: pilot drill is not included)
• Note: water must be added continuously during use.
• Use scene: for drilling in concrete, reinforced concrete, masonry and stone.
• 【After-Sales Service】: If you have any questions during use, please feel free to contact us via the order page.

This product is suitable for building, water, electricity, gas, air conditioning and pipe installation through holes in the wall. Recommended Use: Diameter 68 mm: 2-5P climate cabinet pipe. Diameter: 82 mm: General factory. Diameter 112 mm: installation of waste water, extinguishing water pipe or wire box. Precautions for use: Install drill: first check whether the spindle swings, whether the electrical and mechanical parts are fine, and when installing, make sure that the drill bit is clamped and held centrally with the drill. Rhinestone: water must be added continuously during use. It is used in drilling and core technology. It is recommended to use stationary or hand-held drills.