SHDIATOOL Dry Diamond Drill Core Bit 2PK 25mm Hole Saw with M14 Thread for Porcelain Tile Granite Marble

2 pieces Diameter 25mm vacuum brazed diamond drilling core bits with M14 connection for Angle Grinder Diameter: 25mm; Total height 60MM; Diamond height 15MM; M14 Thread Dry/Wet drilling for porcelain tile granite marble stone masonry brick... Vacuum Brazed technology provides longer working life; Fast and smooth drilling High diamond exposure rate provides a faster and more aggressive drilling; Minimizing any breakage and safe for operator