This tap and drill combo set is designed to create the pilot hole and precision thread necessary to accept a precision 4-40UNF screw. These are commonly used in knife and gun making. Our drills and taps are designed to work in combination to create the best thread result possible.
Each set comes packed in a dual-compartment, locking combo case. This insures that storage is organized and the cutting surfaces are protected.
Tap Size: 4-40UNF
Tap Type: Spiral Point
Tap Material: M2 HSS
Drill Size: 0.089"
Drill Material: M35 Cobalt
Set Includes (1) tap and (1) drill