Auniwaig Reduced Shank Drill BitPackage Content:1pcs x Reduced Shank Drill BitSpecification:Cutting Diameter:15mm/0.59"Tatal Length: 130mm-150mm/5.12inch-5.91inchMaterial : High Speed Steel 4241 (HSS 4241)Finish Type: PolishedHardened to: 62-63 HRCShank Diameter: 1/2"Description:1.Polished treatment adds lubricity. Small pockets on the surface of the tool that act to hold coolant near the cutting edge.2.High-speed steel tool is good for most general purpose applications, featuring a combination of hardness and toughness for wear resistance.3.Running in a counterclockwise direction (right-hand cut), spiral fluted tool evacuates chips up and out of the cut to reduce clogging.4.Reduced shank drill expand the size range capacity of a portable drill chuck. Common flute and overall length for minimal adjustment during tool changes.Design for drilling in low and medium tensile strength materials, such aluminum, copper, cork, plaster, plastic, rubber. Reduced shank drill bit is widely suitable for wood processing (Hardness of the material to be drilled should not exceed 29HRC.)Note:1.To make clean and precise holes, water is required for lubrication and cooling when drilling metals. The feed speed also should be controlled.2. Low drill pressure and increased use of water lubrication will extend drill bit life.