sambad stantsi ülemise poole täpseks juhtimiseks alumise suhtes stantsi valmistamisel, seadistamisel, töö käigus ja ladustamisel (vt juhtsamba puks), hardened, ground round pins or posts that maintain alignment between punch and die during die fabrication, setup, operation, and storage; if the press slide is out of alignment, the guide pins cannot make the necessary correction unless heel plates are engaged before the pins enter the bushings (see: guide pin bushing)