Seimneire 4-14 Inch Hole Saw With Heavy Duty Arbor, 12 Inch Cutting Depth Hss Bi-Metal Hole Drilling Cutter For Smoothly Cutting In Wood Cornhole Boards Plastic Drywall Thin Metal Specification: Material: High-Speed Steel Bi-Metal Color: Blue Surface Treatment: Silicon Carbide Coating Cutting Diameter: 425 108Mm Cutting Depth: 12 305Mm Hex Shank Arbor: 716 11Mm Center Bit Dia: 14 625Mm Allen Wrench: 532 4Mm Package Included: 1 X 4-14 Hole Saw 1 X Hex Shank Arbor 3 X Center Bits 1 X Allen Wrench Please Note 1 Hole Saw May Become Overheated And Get Damaged Or Even Burned Up Due To Fast Rotary Friction, We Suggest Customers To Use Coolant (Not Includes) To Keep The Hole Saw Cold During Usage 2 Holding The Drill Straight To The Cutting Surface, And Drill As Clockwise Rotation 3 Keep The Drill Be Stable When Drilling, Otherwise, The Center Bit May Get Snapped Due To Excessive Shaking 4 Start Drilling With A Slow Drill Rotary Speed, Or The Center Bit May Be Shattered On First Use Warm Notices: 1 The Colors May Have Difference As The Different Display, Please Understand 2 Please Allow 1-2Mm Error Due To Manual Measurement, And Make Sure You Do Not Mind Before You Bid The Best Unconditional 90 Days Guarantee For Free Seimneire Hope You Have A Pleasant Shopping Experience With Us And Satisfy 100 If There Are Any Items Or Delivery Problems, Please Email Contact Us First, We Can Address Your Concerns In 24 Hours Usually Please Give Us The Opportunity To Resolve Any Problem, Thank You Seimneire Provides A 100 Money-Back Guarantee Within 90 Days, If Your Product Is Has A Manufacturer Defect, We Want To Improve Your Experience By Giving You A Replacement Or Refund