Concrete Hole Sawing Wall Cutter Drill Bits Connecting Rod for Concrete Brick Cement Stone Masonry

Size: 30mm ( 1-3/16" 40mm（1-9/16"),50mm(2"), 65mm(2-9/16"),1x 220mm 8-7/10", 1x center positioning drill bits (110mm 4-5/16"), 1x Screw,1x Key Wrench. This concrete hole Sawing set is selected of steel, high hardness, rust prevention, and durability, The hole Sawing comes with a ventilation holes, Effectively improve work efficiency. Suitable for multiple materials, such as hollow brick, cement wall, concrete wall. Can be used to install openings for air conditioning, water pipes, water heaters, pipes, sewers. Equipped with a hole Sawing drill Bits, suitable for manufacturers, Adding coolant during continuous high-speed drilling, It can prevents the drill Bits from burning, Increase the service life of the product. This Concrete Hole Sawing comes with a portable storage case for convenient use and store.