Flyshop Diamond Coated Drill Bit Marble Glass Hole Saw, 8mm, 3-Piece 1-3 week to USA with track number, 2-5 week to other country Product Name : Glass Hole Saw;Main Material : Metal Cutting Hole Diameter : 8 mm/ 0.31" ;Shank Hole Diameter : 4.8 mm/0.19" Total Length: 49.7 mm/1.96", Color : Silver Tone;Weight : 20g Package Content : 3 x 8 mm Glass Hole Saw