uxcell Diamond Coated Tip 40mm Ceramic Glass Hole Saw Cutter Tool Product Name : Glass Hole Saw;Type : 40mm/1.57&#39;&#39; in Hole Diameter Material : Metal, Diamond Particles;Color : Silver Tone Shank Size : 25mm x 10mm/0.98&#39;&#39; x 0.39&#39;&#39; (L*D);Total Length : 56mm/2.2&#39;&#39; Weight : 54g Package Content : 1 x 40mm Glass Hole Saw