Form/special drills produce a specific hole profile in one operation—step drills (multiple diameters at once), counterbore drills and drill-chamfer combinations—merging operations for efficiency and consistency, common in high-volume work or for fixed hole forms. Mainly carbide and HSS, standard or made-to-drawing. Provide the target hole profile (diameters, depths, chamfer angle) and material to confirm tool spec and chip handling.