1、HOLE OPENER KIT: Including 2pcs concrete wall hole openers, equipped with a adapter, convenient for installation and use, which are simple and practical. 2、CARBIDE MATERIAL: The hole opener adopts high temperature quenching process, forged with carbide to ensure high hardness, incisive and durable. 3、HIGH EFFICIENCY: The carbide head has fine grinding angle of 135 degrees, which is easy to cut into the wall, realizing fast drilling and high efficiency work. 4、CLEAN OPERATION: Sharpness of 3 flute teeth and chip discharge hole design can quickly remove internal and external scratches to ensure clean operation. 5、APPLICABLE SCENES: Applicable to impact drill, electric hammer, etc., used for processing brick wall, cement wall, air conditioning holes, water pipe holes.