1、Excellent Emery And Alloy Steel: This hole saw kit is made of excellent emery and alloy steel, with high hardness, wear resistance and fast drilling speed. 2、Accurate Positioning: This hole saw kit is accurately positioned and can quickly find the location that needs to be opened, with strong opening performance. 3、Non Slip Recess Design: This hole saw kit has small grooves on it, which can effectively prevent the hole puncher from slipping and affecting the efficiency during the hole opening. 4、Neat Hole Opening: The hole opened by this hole saw kit is neat and sleek, no broken edge, low resistance to cutting, fast opening speed and easy chip removal. 5、Wide Application: This hole saw kit is versatile and can be used to open holes in hard materials such as glass, tile, marble and glass tile.