FREE SHIP (United States) Important Remind: The 1 1/2 Inch core bit and 5 Inch PVC Pad Backer is 5/8"-11 Thread. NOT M14 Thread. This pack carries (a)-(c): (a) 1 Piece of 5 Inch Velcro Pad Holder (5/8"-11 Thread arbor. Velcro pad holder max velocity is 5000 RPM. Please do not use it with high speed grinder / polisher). 1 Piece of 5 Inch Professional diamond glaze buffer (it brings mirror like polished result to granite marble stone). 16 Pieces of 5 Inch Diamond Polishing Pad for stone concrete: 3 X Grit 50 100 200 400, 2 X Grit 800, 1 X Grit 1500 3000. (b) 1 Piece of Diamond 5" Turbo Convex / Concave blade for granite marble concrete travertine circle shape cutting. (c) 1 Piece of Premium Professional grade 1 1/2" or 38 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 1/2" or 38 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