Bitray Titanium Coated Straight Flute Step Drill Bit Set, 4-20mm Step Cone HSS Coated Straight Slot Hexagonal Shank Hole Step Drill Bit Set with Plastic Case

Specification: Name: 4-20mm Drill Bit Set Hexagonal Shank: 1/4" Material: 4241 high speed steel Packing: Plastic case Compatible equipment: Universal hand drill and bench drill Application: Drilling and reaming of metal sheet pipes such as iron, aluminum, copper, etc. within 5mm 135° Split Point Tip: Increases cutting speed with self-centering and prevents walking Tri-flatted Shank: Fits into power tools chuck securely and eliminates slip Feature: 1.Our step drill bits are constructed from traditional HSS combined with a titanium coating to make them even more durable. 2.The capability and durability of the drill to last through multiple drillings on surfaces such as: plastic, aluminum, copper, stainless steel, and so much more. 3.Two flute design also lets the material particles escape easily for a much more clean drilling operation. 4.The tri-flatted shank is a great universal fit that will give you confidence while you work knowing that your drill bit is securely in place. 5.Easily identify which size you need with the contrasted, laser engraved sizes inside the step drill bit flute. 6.This drill kit is ideal for DIY projects at home, garden, workshop and many more.