1Pc Titanium HSS Step Cone Drill Bit Hole Set Spiral Groove

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Can effectively extend the service life of the drill.
Two flute design provides faster, smoother and cleaner cuts, each step is clearly labeled with the depth diameter in steps.
Great for using to cut holes in a variety of materials including steel, brass, wood, plastic, etc.
They also help to enlarge existing holes.
Specification:Size: (Optional)
5 step 4-12mm, total length 67mm/2.6inch
9 step 4-20mm, total length 77mm/3.0inch
15 step 4-32mm, total length 102mm/4.0inch
Package Includes:1 Piece Step Cone Drill Bit Step Cone Drill Bit ; Shank Step Drill Bit Cone;Cone Hole Tool;Titanium Coated Bit Hole ;HSS Spiral Groove Drill Bit

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