Feature:1. Firstly position at an oblique angle of 45 degree, then drill the hole vertically (note low speed operation about 800-1000rpm).2. Fit for bench drill, power drill and machine tools with drilling function but not for impact drill (Cannot use the impact function to drill).3. Suitable for drilling on stone, ceramic, vitrified tile, glass, etc. You need to constantly adding water to cool in the process of drilling.4. The cutting edges of drill bit adopts section design for reduced cutting resistance, also conductive to chip removal.5. Universal triangle drill shank can effectively prevent skidding during drilling and bear more torque.6. Long oval hole on the drill bit is more conductive to the discharge of the chippings.Specification:Specification (Optional)Total LengthHandle Length Handle DiameterWorking Depth25mm82mm / 3.23in25mm / 0.98in9.4mm / 0.37in58mm / 2.28in30mm83mm / 3.27in25mm / 0.98in9.4mm / 0.37in58mm / 2.28in32mm82mm / 3.23in25mm / 0.98in9.4mm / 0.37in58mm / 2.28in35mm83mm / 3.27in25mm / 0.98in9.4mm / 0.37in58mm / 2.28in38mm83mm / 3.27in25mm / 0.98in9.4mm / 0.37in58mm / 2.28in.Package List:1 x Drill Bit