uxcell 20mm Dia. Metal Glasses Tile Hole Saw Cutter Tool Product Name : Glass Hole Saw;Hole Diameter : 20mm/0.79'' Material : Metal, Diamond Particles;Color : Silver Tone Shank Size : 25mm x 8mm/0.98'' x 0.31'' (L*D);Total Length : 55mm/2.2'' Weight : 25g Package Content : 1 x 20mm Glass Hole Saw