Milwaukee 49560503 Diamond Core Drill Gen II Ø 5 mm. Diamond core drills and hole saws are designed for cutting holes in extremely hard materials such as porcelain, stoneware, cast iron, or fiberglass. These drills and hole saws guarantee a long lifespan and fast cutting, even in the toughest materials. They can be used on angle grinders with the appropriate adapter or with a drill. Minimal water cooling: A continuous flow of water is not required to cool the bits and the hole saw during cutting. Simply immerse them in water before starting to cut and every 5 seconds during cutting for optimal performance. Clean holes: You drill clean and precise holes without scratches. Excellent lifespan and durability thanks to the high-quality diamond bond and the strong alloy that does not bend under load. Easy removal of the support through multiple access slots. Diameter 5 mm connection 1/4.