Diamond Tool Drill BitIt is cut clean, smooth, no broken edges and no trembling phenomenonSmall cut strength, improved the openning speedExcellent for clean and precise holes on glass and tilesDesigned with diamond coated tip and rugged metal housing, provides good performance and longer lifeProduct name: glass ;Material: metalColor: silverCutting hole diameter: 6 mm / 15/64 "Shank hole diameter: 4mm / 0.16 "Shaft diameter (approx.): 6 mm / 15/64 "Total length: 50 mm / 2 "Size: 5x0.6x0.6cm / 2x0.236x0.236InchWeight: 36 gPackage Included:10 x glass Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.