TKQ-01 10pcs Diamond Drilling Core Bits for Porcelain Tile & Marble1. Drill Bits Diameter: 6mm, 8mm, 10mm, 25mm, 35mm, 50mm, 65mm Total Length: 60mm Connection: 5 8 11 Threa Diamond Segment Height: 10mm 2. Finger Bit Diameter: 10mm Workable Length: 50mm Connection: 5 8 11 Thread Total Length: 75mm 3. Chamfer Bit Diameter: 50mm Workable Length: 45mm Connection: 5 8 11 Thread Total Length: 55mm 4. SDS Adapter Function: Enables the use of 5 8 11 threaded core bits with standard SDS drills (hand drill or electric drill).