CPROSP Diamond Core Drill Bit 112 mm 1¼ Inch UNC Core Drill Bit L 420 mm for Concrete, Reinforced Concrete, Masonry and Stone

• Compatible equipment: manual concrete drill and core drill (please note: do not use with electric hammer and impact drill)
• 【Product Parameters】: core crown diameter: 68mm; Total length: 420mm; Working length: 370mm; Teeth: 7; (Note: centering drill is not included)
• 【NOTES】Water should be added continuously during use. When using the water drill bit extension, you must first tilt the drill bit to make a mark on the work surface, and then place the drill in a horizontal position to continue drilling.
• Use: for drilling in concrete, reinforced concrete, masonry and stone.

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. Diameter 112 mm: laying of waste water, extinguishing water pipe or wire box. Precautions for use: Install drill bit: first check whether the spindle is swinging, whether the electrical and mechanical parts are in order, and when installing, make sure that the drill 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 drilling equipment. Warm Tips When using the water drill extension, you should tilt the drill bit first to make a mark on the work surface, and then put the drill in a horizontal position to continue drilling. This ensures accurate and efficient drilling. Please follow this procedure to achieve a good result.