STROTON Metric M35 Cobalt Step Drill Bit for Stainless Steel and Hard Metal (4-32mm/15 steps)

• Premium M35 Cobalt Steel ,66-69 HRC (Rockwell Hardness Scale) ,Usually Give the Best Heat,Wear and Chip Resistance and Long Tool Life.
• Grinding the Cutting Edge Three Times,with the High HRC and Heat Resistance of the Material,Desigh for Cutting through Stainless steel , Iron plate, Aluminum,Ducts,Wood,PVC and Plastic.
• This Cobalt Step Drill Bit is Typically Capable of Running Two to Three Times Faster.Despite the Higher Price,the Cost Per Hole When Using Cobalt Drill Bit Will be the Lowest,Since It Can Produce So Many More Holes.
• [4-32mm] 15 Steps (4mm,6mm,8mm,10mm,12mm,14mm,16mm,18mm,20mm,22mm,24mm,26mm,28mm,30mm,32mm)

（Ⅰ）Product Advantages: (1) The "Cobalt" from STROTON ,Add enough rare metals from STROTON to ensure the quality. (2)This step drill bit is made of Premium Cobalt (80,000 dollars per ton). (3)This step drill bit works in materials such as sheet metal, ducts, steel, copper, brass, aluminum, plastic, vinyl siding, plasterboard, PVC, stainless steel and cast iron. （Ⅱ）Some Important Tips about drilling stainless steel and hard metal: (1)Running the step bit at Low Speeds and using a little appropriate cutting fluid (Drillling metal) will extend its service life. (2)Adding cutting fluid, engine oil or water to prevent the stainless steel from overheating and forming a very hard oxide layer.It also works adding some vinegar,soy sauce if you don't have cutting fluid. (3)Cutting Thickness ___________________________________ Stainless Steel Sheet ----------------------- Hand Drill ≤2mm Drill Press ≤5mm ___________________________________ Metal Sheet,Pvc,Woodboard and etc --------------------------------------- Hand Drill ≤5mm Drill Press ≤5mm _____________________________________