uxcell Silver Tone Diamond Coated Tip Marble Tile 40mm Hole Saw Drilling 2 Pcs Product Name : Marble Hole Saw;Drilling Diameter : 40mm / 1.57" Shank Size : 18mm x 7mm / 0.71" x 0.28" (L*Dia);Total Length (Each) : 48mm / 1.89" Material : Metal, Diamond Particles;Color : Silver Tone Total Weight : 80g Package Content : 2 x Marble Hole Saws