1、Brazing Coating Process: The surface of the hole opener is brazed and coating process, so that will not be deformed or chipped during cutting. 2、Special Hole Design: Special hole design on the head for easy chip removal, low cutting resistance and fast drilling efficiency. 3、Professional Non Slip Handle: Professional non slip handle reduces the burden on the machine. Wide range of use, clamping and tightening. 4、Application: The hole opener is used to drill hard surfaces such as glass, wood, ceramic tile bottles, block jars, ceramics, slate, granite pumice, etc. 5、Good Performance: The hole opener has a long service life, high quality and good performance, which is very suitable for punching clean and accurate holes.