Diamond Hole Saw Kit 17PCS Tile Drill Bits Sets with Double Suction Cu

15 Pcs Hole Saws Are Made Of Diamond Integrated Steel, Which Are Strong And Sturdy. The Surface Adopts High Anti-Corrosion Electroplating Process, And Thickened Diamond Coating On The Top Provides Excellent Cutting Strength For High-Precision, Smooth Cuts. Reducing Drilling Speed And Pressure, Increasing The Use Of Water Lubrication Will Greatly Extend The Service Life.