Retail 2X 40Mm/50Mm Dia Diamond Tipped Tile Ceramic Glass Hole Saw Drill Bit 2 x Glass Hole Saw: 1* 40mm/1.57 inch + 1* 50mm/1.97 inchProduct Name : Glass Hole Saw; Main Material : MetalCutting Hole Diameter(Approx.) : 40mm/1.57 inch; 50mm/1.97 inchShank Hole Diameter : 4.7mm/0.19 inch; 5mm/0.2 inchShank Size (Approx.) : 9.9 x 24mm/0.4 inch x 0.9 inch (Diameter*L); Total Length : 57mm/2.24 inch; 55mm/2.2 inchColor : Silver Tone; Weight : 116gdiamond coating on this hole saw give superior performance and longer life. Excellent for making clean and accurate hole on glass, ceramic and tile. Works better with a electric drill(here is not included). Package Content : 2 x Glass Hole SawOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.