Titanium Coating: Titanium coated peeler bit provides good resistance to corrosion, heat and rust; reduces friction and heat; for longer life even at extreme temperatures.13 Drilling Sizes: For different hole sizes, you only need one tag drill bit; 13 sizes are on the tag drill bit for your convenience: 5mm, 7mm, 10mm, 12mm, 15mm, 17mm, 20mm, 22mm, 25mm, 27mm, 30mm, 32mm, 35mm.Fast Drilling: Double blade design provides faster and frictionless cutting. Please note that during the tag drill bit working, pour some water to cool the tag drill bit; The service life of the HSS tag drill bit will be effectively extended.Material: The countersink drill bit is suitable for home repairs and light work such as drilling holes in plastic, copper, aluminum and many other types of sheet metal; but not suitable for stainless steel.HSS Metal Tag Drill Bit 535mm with SmallWith its high speed steel construction and double blade design, the tag drill bit provides faster, comfortable and friction-free drilling. The titanium coating ensures that this countersink drill bit has excellent durability, ideal for home repairs and light work such as drilling holes in plastic, copper, aluminum and many other types of sheet metal, but not suitable for stainless steel. With a small case, the drill bit can be easily stored and transported.Features:The HSS step drill bit made of high-speed steel and with double cutting blade provides faster, comfortable and friction-free drilling.With a titanium coating, the step drill offers good resistance to corrosion, heat and rust. Even at extreme temperatures, the titanium coating ensures a longer service life.For different hole sizes, you only need one step drill bit, to repair the house and work easily. While working the drill, pour water to cool the tag drill. Drilling holes in plastic, copper, aluminum and many other types of sheet metal, but not suitable for stainless steel. Technical data: Crotch: 5 mm, 7 mm, 10 mm, 12 mm, 15 mm, 17 mm, 20 mm, 22 mm, 25 mm, 27 mm, 30 mm, 32 mm, 35 mm. Material: high speed steel Scope of delivery: 1 tag drill.