Dottie HPS300 - 3'' Cup & Die Set (2-1/2'' Conduit) is made of high speed alloy steel for durability. This punch tool set is designed for use with hole punch tools, featuring centering lines and size markings laser etched on cups and dies. With a black oxide finish, dies require 50% less torque and feature a 3 point design to eliminate slug binding. Cups and dies are interchangeable with competing brands.