Drilling kits used by professional carpenters to easily drill perfectly aligned holes【Innovative three-blade design】Designed as three blades for layered cutting, the cutter set for metal can make the cutting resistance to smaller, and the chip drainage is smoother. It can extend the service Life.【Fast cutting】The teeth of the metal cutter kit are designed as a front and rear low upper tooth profile and with three blades, which make it more efficientThan drilling flat teeth. It is widely used in home DIY, auto parts, woodworking, professional machinery repair, etc.【Top Quality】Made of YG8 tungsten carbide stainless steel, Titanium carbide tooth is sharp, anti-corrosion, and durable. Ideal for handheld electric drill, stand motorized drill, and mobile ribbon type magnetism drill. The wood can be drilled about 20mmDepth and 5mmTo stainless steel.【Easy operation】Center for the first timePenetrateMaterial and takes it as a center ExactlyOpen the hole. The spring design of the centering drill controls the amount of feed and avoids sudden feedAnd damage to the drill bit.【Multifunctional Tools】The carbide end mill is widely used in stainless steel plate, hard metal, iron, mild steel, alloy steel, aluminum, FRP and plastic for drilling holes. Ideal for installing Door and Cabinet Locks, or drilling larger diameter holes through desks, etc. (Tip: Not recommended for tile, glass, concrete, stone.)Material Type: High Speed SteelMaterial: AlloyColor: SilverLength: 65-70mmHandle Size:10mmOuter Diameter Size:16mm, 18mm, 20mm, 22mm, 25mm, 30mm, 35mm, 40mm,45mm, 50mm, 53mm, 53mmFeatures:Each edge is part of the cutting characteristic, so that the hole is not easy to produce the phenomenon of fallingStainless steel plate, steel, casting, aluminum alloy, iron and other types of drilling metal plateChip removal, excellent performance, sharp edge, wear resistanceNote: This product is not easy to cut relatively thin metal material, can be cut into 2-5mm stainless steel plate, and metal platele; 15mmPackage Included: 1X Hole Drill Bits