Converts your cordless drill into a robust water feed system. Easily drill glass, stone, tile, and more. Fingertip water-flow control Compatible with common diamond drill bits and core bits. Accessories allow you to bullnose tile, polish, repair scratched windshields, and more! The ergonomic handle provides additional stability and control while drilling and it also provides fingertip water-flow control. Compatible with common diamond drill bits and core bits.