Did a DIY project and redecorated our bathroom. Use this tool to cut 2cm thick hard granite, cement board and wood. I was struck by the fact that he continued to work. I bought a brand name tool that stopped working after 3 holes in granite, but this Drilax was up to the task. Highly recommended. Granite and faucets are everywhere in this video. We used this tool to drill holes. I would recommend using a pond or bowl of water to keep the bat clean.