Fangrui Product Details Wide Range Of Sizes: This Step Drill Bit Offers Three Different Sizes (20mm, 35mm, And 50mm), Providing Versatility For Various Hole Opening Needs Efficient Cutting: The Straight Flute Design Ensures Effortless Cutting Through Materials Like Wood, Aluminum, And Metal Sheets, Resulting In High Efficiency For Your Projects Sturdy Construction: Crafted With Premium Materials And Hardened Edges, This Step Drill Bit Is Built To Last, Offering Enhanced Durability And Long-term Usability Precise And Accurate: With Its Precise , This Milling Cutter Creates Clean And Accurate Holes Without Any Jagged Edges, Allowing You To Achieve Professional Results In Your Woodworking And Metalworking Tasks Convenient Hole Opening: Whether For Diy Projects Or Professional Applications, This Hole Opener Offers Easy And Convenient Hole Opening, Saving You Time And Effort Product Name:step Drill Bit Size:. 20mm, 35mm, 50mm(hole Opening Diameter) Application:for Woodworking Colour:silver Material:metal + Diamond Package Contents