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13pcs 16-65mm HSS Drill Bit Set Hole saw Hole Saw Cutter Drilling Kit Hand Tool for hin Stainless Steel SS, Mild Steel, Cast Iron, M.S, Aluminium Etc | Suitable For All MetalsScope of application:Metal hole opener, which can be used for opening holes in metal such as thin metal, iron plate, channel steel and aluminum alloy.Instructions for use: When drilling, the hole opener should slowly contact the object to be drilled, can not hit the workpiece, and the rotation speed should be low (the larger the hole opening, the lower the rotation speed). If necessary, coolant or water can be added. Please pay attention to slow down the feed speed when you are about to drill through.1. The material to be cut must be fixed and cannot be moved. It should be at a right angle of 90 degrees to the opening.2. When positioning the drill, please wait a moment and then drill slowly.3. In the course of operation, if there is any abnormality or unsatisfactory troubleshooting, please stop working and cut it to work. 4. Please do not use too much force when screwing up and down, so as not to screw the screw. 5, can be used in pistol drills, bench drills, magnetic drills, air gun drills and other drilling machinesFeatures:100% brand new and high quality and professionalCuts quickly, precise holes in Steel, Stainless Steel,iron, Copper, Brass, Aluminum, Fiberglass, Formica And Other Laminates In SecondsPerfect for Installing Locks, Knobs in Doors and Cabinets or Drilling Larger Diameter Holes Through Features:- High-quality and professional.- Cuts quickly, precise holes in teel, stainless steel, iron, copper, brass, aluminum, fiberglass, foemica and other laminates in seconds.- Perfect for installing locks, knobs in doors and cabinets or drilling larger diameter holes through desks ect.- Can be used as car bus truck parking sensor radar syster drilling hole.Package Include:1 x 13pcs 16-65mm HSS Drill Bit Set Hole saw Hole Saw Cutter Drilling Kit Hand Tool for Wood Stainless Steel Metal Alloy Cutting 16/18/20/25/30/32/35/38/40/50/55/60/65mm