conical tool for sale, brand-new and used.

#4 UNIBIT STEP DRL Uncoated Or TiN Coated • Ground From The Solid Applications Specialty step drill designed to machine a large number of different hole diameters with a single tool. Single cutting edge creates perfectly round holes in metal, plastic, and wood without center punching. Conical design permits as many as 13 different size holes to be drilled with one drill.