Specification Brand : LEKOMESH BulletPoint1 : 【Size】4pcs in total: 4pcs;1/4"(6mm)/5/16"(8mm) diamond tile drill bits + 1pc 4/5"(20mm) Diamond Chamfer Bits+ 1pc HEX Shank Adapter BulletPoint2 : 【Application】Dry drilling/milling/chamfering for porcelain tile, granite, marble, stone, Masonry, brick... Wet drilling/milling can prolong the service life BulletPoint3 : 【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 BulletPoint4 : 【Features】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 on the pack. BulletPoint5 : 【Storage】Portable suitcase included. for easy carry and storage and protect of the diamond tools ExternallyAssignedProductIdentifier1 : 791180055408 ExternallyAssignedProductIdentifier2 : 0791180055408 FinishType : Diamond ItemName : LEKOMESH Diamond Core Drill Bits Set 4pcs Tile Hole Saw Kit for Porcelain Tile Ceramic Marble Brick Concrete with 5/8-11 Thread(6/8mm+4/5" diamond chamfer bit+HEX Shank Adapter) ItemPackageDimensions_Height : 1.2 inches ItemPackageDimensions_Length : 5 inches ItemPackageDimensions_Width : 4 inches ItemPackageQuantity : 4 ItemTypeKeyword : hole-saw-sets Manufacturer : LEKOMESH Material : Diamond Material1 : Diamond Material2 : Alloy Steel ModelNumber : BDB54909405R101 NumberOfItems : 4 PartNumber : LE2-DA-L15 ProductDescription : 1. When you are building/remodeling a bathroom or kitchen like installing shower or install the faucet and handles in bathroom, you will need to drill holes through Porcelain tiles without cracking, so you could use our diamond tip drill bit to make those holes very precise 2. This tile hole cutter adds wax lubricant inside. During drilling, the wax will melt to cool the cutting surface, add additional water can prolong the working life of the bit and to remove the debris during the drilling process. 3. For a better finish and longer duration of the porcelain tile drill bit,you could start on a slight angle at its lowest speed for better control, then with light pressure carefully work through the tile 4. The average life of the tile hole saw depends on several factors,including the type of material, its thickness/hardness ,proper cooling and use 5. This is the ideal diamond drill bit for rock, DIY ,ceramic workers, construction workers, general contractors and tradesmen 6. Quality Creates Better Life. All our products are subjected to strict quality tests. We want all the products can be recognized for their quality and durability. 7. Package: Silver aluminum box, easy to store, recyclable