Danly Demountable Bushings are manufactured of hardened steel and prefitted to precision guide pillars. Prefitting is consistently accurate so that bushings [guide bushing] and guide pillars of the same diameter are interchangeable. Danly Demountable Bushings seat flush with the ground face of the punch holder with a tap fit. They are assembled in the punch holder with easily mounted clamps that serve to maintain perfect alignment of the bushings [guide bushing], with the bore perpendicular to the ground surface of the punch holder. The use of clamps and screws gives Danly Demountable Bushings four times the holding power of pressed-in bushings.