Large Step Drill Bit, 1/4 to 2-3/8 inch High Speed Steel Drill Cone Bits for Sheet Metal Hole Drilling Cutting, Sprial Unibit Extra Large 2-3/8 inch

High Speed Steel: The ladder drilling group performs well in heat resistance, corrosion resistance and rust prevention. The high speed steel structure ensures high durability.
Good Adaptability: It can easily drill the size you need by comparing the laser engraving size in the ladder drill slot. Only a small amount of pressure is required to cut steel, metal plates and other surfaces and remove burrs.
Engraved Sizes - Easily identify which size you need with the contrasted, laser engraved sizes inside the step drill bit flute.