A Harvey Performance Company

Holemaking & Threading Tools

Holemaking and threading applications demand precision accuracy, strength, and durability. Micro 100 fully stocks strong, durable solutions for Holemaking, including drills, Combined Drills & Countersinks, and Thread Milling Cutters.


Micro 100's Drills offering includes Spotting & Centering Drills, Spade Drills, and Jobber Length Drills, each engineered to fulfill a unique drilling purpose, ground from solid carbide, fully stocked, and ready to ship same day.

Combined Drills & Countersinks

Designed for predrilling 60° live center holes, Micro 100's Combined Drill & Countersinks are double-ended for quicker tool changes.

Thread Milling Cutters

Browse from a variety of Threading Milling Cutter styles, including Single Form for UN threads, and Multi-Form for UN, NPT, NPTF, or Metric threads. In addition, our Thread Milling Cutters are optimized for milling thread relief at the bottom of a thread.