Features 1、Low Cut Resistance: With strong toughness and wear resistance, low cut resistance, and increase opening speed 2、1/4in Hex Shank: 1/4in hex shank can be installed in electric drills and electric drills, and can be quickly released 3、Application: Drill bit is widely suitable for ceramic, granite, ceramic tile, stone, wood, plastic, concrete wall 4、Smoother Drilling: This is cross drill bit, which can drill faster and smoother, saving your time and energy 5、Fine Function: This is cross drill,which has fine function, non burrs, and brings you a wonderful experience Specification Item Type: Cross Hex Drill Bit Material: Carbide Blade Diameter: Approx. 5mm / 0.20in, 6mm / 0.24in, 8mm / 0.31in, 10mm / 0.40in, 12mm / 0.47in Shank Diameter: 1/4in Hex Shank Uses: Openings for glass, concrete, cement walls, etc. Package List 5 x Drill Bit