uxcell Silver Tone 20mm Marble Tile Hole Saw Drilling 50mm Length 6 Pcs Product Name : Marble Hole Saw;Drilling Diameter : 20mm / 0.79" Shank Size : 17mm x 7mm / 0.67" x 0.28" (L*Dia);Total Length (Each) : 50mm / 1.97" Material : Metal, Diamond Particles;Color : Silver Tone Total Weight : 107g Package Content : 6 x Marble Hole Saws