uxcell Silver Tone 15mm Dia Diamond Coated Tipped Glass Hole Saw 3 Pcs Product Name: Hole Saw; Material: Metal, Diamond Particles Hole Diameter (Approx.): 15mm/0.59"; Shank Size(Each): 20 x 6.5mm/0.78" x 0.26"(L*D) Total Length (Each): 50mm/1.97"; Color: Silver Tone Weight: 43g Package Content: 3 x Glass Hole Saw Tool