uxcell Step Drill Bit HSS 5mm to 35mm 13 Sizes Titanium Coated Straight Flutes Round Shank for Metal Wood Plastic

Features: Laser marking makes the size more clear; High speed steel for longer service life; Used on electric drills and drill presses; Double cutting edges design enables a faster and smoother cutting; X-type openings design to facilitate the removal of cutting waste when drilling; The sharpness and titanium coating ensure easily cut through most metal, aluminum, plastic, wood and other materials with ease; Specifications: Surface Treatment: Titanium Coated Material: High Speed Steel Shank Diameter: 13mm / 0.5 inch Step Quantity: 13 Total Length: 73mm / 2.9 inches Cutting Diameters: 5mm,7mm,10mm,12mm,15mm,17mm,20mm,22mm,25mm,27mm,30mm,32mm,35mm Package Content: 1 x Step Drill Bit Maintenance Tips: 1.Not compatible with hammer drill. 2.It is recommended to oil the bit before every use. 3.Please drill a smaller hole to make drilling smoother. 4.Please do not set drilling speed too high to avoid damages to cutting edge. 5.The metal sheet on which you want to drill should not exceed 0.38 in thickness. 6.Check the concentricity of the spindle and spring chuck and the clamping force of spring chuck, for it may cause the drill bit broken and make drill hole too large.