1、Round Shank: Our hole saw bit kit is rapid punching, high speed, and round shank. Let you improve your work efficiency. 2、Applicable Materials: Our hole saw bit kit is widely used in tile, marble, granite, ceramic, glass, glass tile, etc. 3、Not Easy to Fall Off: The hole saw bit kit uses a brazing process, the emery is firmly set in the cutting part of the blade, not easy to fall off. 4、Easy to Install and Disassemble: This hole saw bit kit is very easy to install and disassemble, sturdy and durable, suitable for lithium powered drill and hand drill. 5、Light Weight: The overall weight of this hole saw bit kit is light and very portable, so you can take it with you when you need it.