3 Glass Diamond Drill Bits for Bottle Lights Lamp kit 1/2" Drill Bit for Glass Bottles with Drill Guide for Straight Holes Guide Holds Glass Bottle Drill Bits Easy to Use Glass Drill Bits for Bottles

These are Professional Grade 1/2" Diamond Hole Saw for Glass and Tile / Diamond Core Drill Bit 13mm With Superior Longer Lasting Cutting Edge Due To The Largest Size Of Diamond Grit / Diamond Teeth We Use Which Creates Cleaner Faster Cutting And A Much Longer Tool Life For Trade Use Compared To Most Regular Diamond Hole Saws That opt To Using Diamond Dust Rather Than A True Diamond Grit. These Diamond Core Bits / Hole Saws Must Be Used Wet with Water and Kept Cool They Will Cut Through Porcelain Granite Glass Stone And Marble. This Size Diamond Hole Saw Bit Is Well Suited For Drilling Holes In Porcelain Tile For Shower Heads Pipe Drilling Through Ceramic Tile For Faucets And Drilling Holes In Granite Countertops For Soap Dispensers And Kitchen Faucet Sprayer. these Diamond Hole Cutting Bits Do Not Have A Pilot Drill, Pilot Drills Are Useful In Hole Saws For Drilling Some Materials But When Drilling Holes In Tile And Glass Tiles A Pilot Drill Is A Bad Idea, If The Pilot Drill Is Not Harder Or As Hard As The Hole Saw Itself When You Are Drilling You Apply Pressure To The Drill And If It Is Even The Slightest Bit Dull It Is Very Difficult To Drill Through Porcelain Tile So You Apply More Pressure And You End Up Breaking Your Expensive Tiles,even diamond drill bits for stone Go Dull Faster Than a diamond HoleSaw So We Decided No Pilot Drill And Using A Guide Would Be Much Better, As A Bonus It Also Makes The Hole Saws Last Even Longer. The Wooden Guide Supplied Can Be Taped To The Wall Or Counter To Hold The Diamond Drill Bit In Place To Avoid The Hole Saw Moving About. Keep Dipping The Bit In Water Every Few Seconds And Allow Water To Run Into The Hole When You Take The Bit Out Of The Hole. This Will Ensure The Diamond Core Bit Stays Cool And Also Make Sure The Material You Are Drilling Through Stays Cool And Prevents Cracking While Increasing The Tools Lifespan. If You Do Not Keep Diamond Bits Cool You Will Wear Them Out Very Quickly, But If You Keep Them Cool You Will Get Many Holes Drilled With These diamond drill bits for porcelain tile. TRADE SECRETS: 1. You Can Drill A Hole Without A Guide If You Start Drilling At A 45 Degree Angle First, Creating A Half Moon Shape Groove, This Will Hold The Bit In Place As You Slowly Bring The Bit To The Upright Or Perpendicular / Straight Position To The Surface, It Is Important To Keep Dipping The Bit In Water To Keep It Cool. 2. A Piece Of Sponge Inserted Inside The Hole Saw Bit Will Hold Water When You Dip It Into A Container Of Water This Will Keep The Inside Of The Bit Cool. 3. For Small Diameter Bits On A Level Surface You Can Build A Small Ring Of Plumbers Putty Around The Area Where You Are Going To Drill And Fill It With Water, This Creates A Small Dam Like A Mini Wet Saw. Always use water when: Using Diamond Drill Bits for Ceramic Using Diamond Drill Bits for Glass Using Diamond Drill Bits for Granite Sizes Available 3/16 ,1/4 ,5/16 ,3/8 ,1/2 ,5/8 ,3/4 ,1 , 1 1/8 , 1 1/4, 1 3/8 , 1 1/2 , 1 3/4 ,2 , 2 1/4 , 2 3/8, 2 1/2 , 2 3/4 ,3 ,3 1/2 ,4 ,4 1/4 ,4 1/2 ,5 , 5 1/2, 7 1/4.