SHDIATOOL Diamond Drill Core Bits Kit with Box 20/27/35/55/68mm and a 20mm Finger Bit an Adapter for Tile Porcelain Granite Marble-Set of 7 by Amazon.co.uk

• Kit 7=5pcs diamond drill bits; 1pc dimond finger bit; 1pc adapter

• Diamond Drill Bit Diameter: 20/27/35/55/68mm; Diamond Height: 15mm; Total Length: 75mm; M14 Thread Dry or wet drilling for tile ceramic granite marble stone

• Diamond Finger Bit: Diameter: 20mm; Workable Length: 50mm; Total Length: 65mm; M14 Thread; Grit #50/60 Dry or wet using for enlarging, shaping and/or rounding bevel existing holes in porcelain, marble, granite and hard ceramic

• Adapter: M14 male thread; 3/8" Hexagon Shank; Total Length: 55mm; Shank Length: 28mm M14 thread core bits can be fitted on hand drill or electric drill

• High diamond exposure rate provides a faster and more aggressive drilling