【SIZE】11pcs in total: 6/8/10/25/35/50/65mm+10mm Finger Bit+50mm Chamfer Bit+Adapter and 4.5 Inch Diamond Saw Blade 【APPLICATION】Dry drilling/milling/chamfering for porcelain tile, granite, marble, stone, masonry, brick... Wet drilling/milling can prolong the service life. 【TECHNOLOGY】This tiling installation kit is made of high quality diamond and steel by vacuum brazed diamond technology. Provide very high efficiency, drilling and milling faster, durable and sturdy. 【FEATURES】Drilling box: fast and smooth drilling, long lifetime, less chipping. Recommended RPM is 6000; Maximum RPM is 11000, Widely used in Angle Grinder, if you want used on hand drill, bench drill, you can use the adapter included in the box; Cutting disc suitable for circular saw and angle grinder. Recommended RPM: 8000, maximum RPM: 13200. 【STORAGE】Portable box included. For easy carry and storage and protect of the diamond tools.