Two Stage Step Drill Bit M3-M12 Screw Counterbore Twist Countersink Drill for Stainless Drilling and Chamfering（M8 90°）

HSS (high-speed steel) counterbore step drills are ideal for counterboring bolt type heads or bolts in wood, plastic, and soft metals.These step drills allow you to drill and counterbore in one operation and are less likely to clog that 2-piece counterbores especially in aluminum.The counterbore angle on bits is 90 degrees or 180 degreesSpecification:Name: Industrial Two step drillMaterial: HSSAngle: 90/180 DegreeQuantity: 1pc Package Included: 1 x Industrial two step drillWarm tipsThe larger the diameter of the drill, the slower the rotational speed requirements, the first use of the customer service please consult the finer the drill hole the more attention to the strength, do not act too quickly, in order to prevent the drill bit breakage caused unnecessary losses!

• - Drill Bits Have Reliable Performance and Durability When Drill Holes on Plastics, Aluminum, Copper, Stainless Steel and Many other Types of Materials.
• - Fully ground spiral cutting edge design, high-precision spiral chip flute design,Removed chip fast.
• - 135 degree double rear angle, sharp drill pin, accurate positioning, no deviation.
• - Universal round handle, not easy to slip, firm and durable.
• -Suitable for Carpenter, Builder, Electrician, Workshop, DIY, Domestic Crafts, Amateurs, Stylist,Etc.