Description：High performance in cutting glass, slate, tile, porcelain etc.Tiny diamond particles coated tip offers sharp cutting.To prolong its using life, please remember to keep it with coolant sometimes.Specification:Product Name: Glass Hole Saw.Drilling Diameter: 25mm / 0.98 inch.Total Size: 50 x 25mm / 1.97 x 0.98inch (L*D).Shank Size: 16 x 7.2mm / 0.63 x 0.281inch (L*D) .Drilling Diameter: 30mm / 1.18inch.Total Size: 51 x 30mm / 2.01inch x 1.18inch (L*D).Shank Size: 17 x 7.8mm / 0.67inch x 0.31inch(L*D).Drilling Diameter: 32mm / 1.26 inch.Total Size:50 x 32mm / 1.97 x 1.26 inch (L*D).Shank Size: 18 x 8mm / 0.71 x 0.31 inch (L*D).Drilling Diameter: 35mm / 1.38 inch.Total Size:50 x 35mm / 1.97 x 1.38 inch (L*D).Shank Size: 18 x 8mm / 0.71 x 0.31 inch (L*D).Drilling Diameter: 45mm / 1.77 inch.Total Size:50 x 45mm / 1.97 x 1.