Specification Brand : Asia Pacific Construction BulletPoint1 : Important Remind: The 1 3/8 Inch core bit arbor is 5/8"-11 Thread. NOT M14 Thread. BulletPoint2 : (a) 5 Pieces of Diamond 5" Turbo Convex / Concave blade for granite marble concrete travertine circle shape cutting. NON Threaded. Inner Hole diameter is 7/8"-5/8". BulletPoint3 : (b) 3 Pieces of Premium Professional grade 1 3/8" or 35 mm diameter Diamond Core Bit Hole Saw with 9 mm segment height, 3.0 mm segment thickness, 4 1/5" overall Height and arbor 5/8" 11 (Made with Premium Diamond) works great on GRANITE, Marble, Concrete, Tiles, stone etc. BulletPoint4 : Below is another combo kit we recommend: BulletPoint5 : http://www.amazon.com/dp/B0838BRQQT?ref=myi_title_dp CompatibleMaterial : Marble CompatibleMaterial1 : Stone CompatibleMaterial2 : Marble ExternallyAssignedProductIdentifier1 : 0656879057876 ExternallyAssignedProductIdentifier2 : 656879057876 ItemName : 1 3/8 Inch Diamond Core Drilling Bit (3 Pieces) and 5 Inch Diamond Turbo convex curved blade (5 Pieces) for concrete travertine sink hole cut granite masonry terrazzo cutter grinder sander ItemPackageQuantity : 1 ItemTypeKeyword : core-drill-bits Manufacturer : Asia Pacific Construction Material : Diamond ModelNumber : 55mmalu7 NumberOfTeeth : 11 PartNumber : 55mmalu7 ProductDescription : Important Remind: The 1 3/8 Inch core bit arbor is 5/8"-11 Thread. NOT M14 Thread. This pack carries (a)-(b): (a) 5 Pieces of Diamond 5" Turbo Convex / Concave blade for granite marble concrete travertine circle shape cutting. NON Threaded. Inner Hole diameter is 7/8"-5/8". (b) 3 Pieces of Premium Professional grade 1 3/8" or 35 mm diameter Diamond Core Bit Hole Saw with 9 mm segment height, 3.0 mm segment thickness, 4 1/5" overall Height and arbor 5/8" 11 (Made with Premium Diamond) works great on GRANITE, Marble, Concrete, Tiles, stone etc. Specifications - Professional Grade 1 3/8" or 35 mm Diameter Wet or Dry diamond drill bit hole saw core drill bit - Drills/Cores through Concrete, Granite, Masonry, Stone, Marble - Segment Height 9 MM, Width 16 mm, Thick 3.0 mm - Optimal RPM 900 - Arbor 5/8" 11 T ProductSiteLaunchDate : 2015-04-30T07:00:00.000Z Style : Compact SurfaceRecommendation : Stone UnitCount : 1