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3 Pcs HSS Steel Step Cone Drill Titanium Metal Hole Cutter Bit Set 4-12/20/32mm
Description:
2 fluted edges for faster, smoother cutting.
Titanium coated to reduce friction and heat.
High-speed steel step drill, higher quality, and more durable than an ordinary twist drill.
Works great in making a smooth, clean, and perfectly round hole.
Suitable for punch holes through sheet metal, iron plate, aluminum plate, brass, wood, plastic, etc.
Includes 3 sizes(4-12mm, 4-20mm, 4-32mm), which meet your different needs perfectly.