Features 1、EFFICIENT HOLE OPENING: Hole saw kit is designed for hard stone such as marble, granite and rock slabs, it can make holes quickly and accurately. 2、MULTIPLE SIZES: The 19 piece set includes a variety of different drill sizes, from 6mm to 60mm, to meet all kinds of hole opening needs. 3、LONG LIFE USE: Adding water can prolong the service life of the hole opener and keep the drill bits in good condition. 4、FLEXIBLE OPERATION: Hole drill bits set can be used at a 45 degree tilt angle or in conjunction with an upright drill for convenience. 5、WIDE APPLICATION: Hole cutter kit is suitable for opening needs of many materials such as ceramic tiles, full porcelain, marble, granite and glass tiles. Specification Item Type: Hole Saw Kit Material: Alloy Steel Size: 6/8/10/12/14/16/18/20/22/25/28/30/35/40/42/45/50/55/60mm Included Quantity: 19 Pieces Application: Marble, Granite, Ceramic Tile, Glass Tile, Etc. Package List 19 x Hole Saw Cutter 1 x Storage Case