3 Review(s)

High speed steel material,durable and practical. - Triangular shank design prevents bit slippage and stable operation. - Sharp teeth,computer indexing,high speed grinding,high precision,less hole opening error. - Drill wall thickness 2mm, increase the service life of the drill. - Perfect for installing locks, Knobs in doors and cabinets or drilling larger diameter holes through desks etc. - Cuts steel, Stainless steel, Copper, Brass, Aluminum, Fiberglass, Formica and other laminates in seconds. - Application for Thin metal, iron plate, channel steel, aluminum alloy. Note: - When you start drilling, the hole opener must slowly touch the drilled object and cannot hit the workpiece. The rotation speed should be low (the larger the hole turning speed is, the lower the rotation speed is). If necessary, coolant or water can be added. When you are about to drill through, please pay attention to slow down the feed rate.