Features： 1、MAIN PURPOSE: Hollow hole opener, with a specification of 110mm, used in electric hammer and impact drills to open holes in brick walls, pipe holes, etc. 2、CEMENTED CARBIDE: Forged with cemented carbide, quenched at high temperature, has incisive edge and high hardness, and is not easy to break when cutting. 3、GOOD STABILITY: The hollow hole saw connecting rod is heat treated, which does not break during use, and has better stability when drilling. 4、WIDE APPLICATION: Used for cutting clean holes in concrete, brick work, drilling walls, stones, installing air conditioners, etc., with strong practicality. 5、EASY OPERATION: The electric hammer hole saw has a standard size, easy to connect and not easy to fall off, which is safe and reliable in operation. Specification： Item Type: Electric Hammer Hole Saw Material: Cemented Carbide Color: Silver Specification: Approx. 110mm / 4.3in Applications: Widely used for cutting clean holes in concrete, brick work, drilling wall, stones, installing air conditioner, etc. Package List： 1 x Electric Hammer Hole Saw